Posts Tagged ‘water parameters’

The Post – A Short Fiddler Update

March 31, 2008

Just a quick update today – so far many babies continue to survive. It’s still early – we’re just into the third day so far. Looking back at the last batch, I lost them around day 9 or 10. So proceeding cautiously on projections here.

As of this afternoon, I can see that the numbers are lower than initially after birth. To be expected. Some die during molting, the larvae are carnivorous and will eat each other, and some just flat out die. That said, there are still hundreds or thousands of very active larvae swimming around that tank. MANY are clustered in the pockets of the reef rock. They seem to LOVE that reef rock. And another large group is clustered on the aragonite sand surface on the bottom near the heater. Just mystifying.

The water, though cloudy, is clearer today. Water parameters remain as before – dead on target: pH 8.0-8.2, alkalinity and hardness 300 or more, chlorine, nitrites and nitrates all zero. I will retest the salinity later and see if I need to raise it just a bit more or if we are close enough to the 1.020 salinity mark.

I continue to feed the Small Fry liquid food. This time, instead of the Kent’s Marine ZooPlex, I remembered I had frozen mini-krill in the freezer. I ground up a small amount of those and spread those around the tank. It appears many little black dots swim up to the granules of floating ground up mini-krill, then swimming off. So it at least seems like they’re chewing on the krill.

I checked on the “brine shrimp hatchery” – it’s hard because if you turn off the air rock, everything still swirls around and the question in my mind was – “how do you tell swirling brine shrimp eggs apart from hatched tiny brine shrimp?” If I shine the light directly in the bottle, I can’t tell any difference. I noticed though if I looked in the bottle after shining the light indirectly (at an angle toward the floor), I could see shadows of things actively swimming around, as opposed to just eggs spinning in the water. So it seems the shrimp are hatching. I thought tonight I’d take a closer look and may siphon some of the shrimp out for tonight’s crab baby feeding. It will be interesting to see if the babies are up for catching live moving shrimps. They seem able to catch “floating” ground up krill so we’ll keep a good thought.

Till tonight……

The Post – New Fiddler Babies

March 29, 2008

I was amazed to see babies born before Monday. Monday was 2 weeks to the best of my knowledge. So she delivered a couple of days earlier than I expected.

Anyway, yesterday started with me doing a 30% water change as nitrite levels in the tank since Scarlett has been in there, have been hovering between 0.5 – 1.0 ppm. I kept the water filter running to give the water the best chance of staying nitrite free and letting the nitrogen cycle mature.

This evening though, I noticed that Scarlett was very agitated. She kept running back and forth in the tank, climbing up onto the air bubbler and waving her claws in front of her as if trying to spread something in the water. There did not appear to be anything in front of her though. I noticed that the center of the egg mass seemed to be swelling. Given that, I went ahead and shut off the water filter.

For the next hour or two, Scarlett O’Hara kept moving around, seeming very uncomfortable. Around 8:30 p.m. I looked over at the tank and noticed she was sitting quietly in the front of the tank eating. She seemed “slimmer.” Looking closer, I realized, she no longer had the egg mass. So I missed the delivery again. However, a quick look around the tank and I could seen thousands of tiny little dots swimming around.

I fed them a small amount of Small Fry and ZooPlex. I wondered if this will go okay since I couldn’t get the nitrites to zero before they were born.

This morning I got up and looked at the tank. It was a white cloud. I thought, “Oh God, the water quality got worse with all the babies in there and the nitrites are probably through the roof.” I looked at the ammonia monitor and it is in the safe zone. I shined a light into the white murk and could see thousands of babies swimming around. So they’re still alive and ?healthy.

Wondering why the tank is so cloudy, I decided to recheck water parameters:

pH 8.0 – good; alkalinity 300, hardness >300, chlorine 0 – all great results, AND the REAL KICKER OF ALL: NITRITES AND NITRATES ZERO!!!! Puzzled, I repeated the nitrites test using a tube test instead of the dipstick. Again – nitrites are ZERO!!

So water quality is actually BETTER??? I looked in the tank and saw all the babies flitting around and MANY on the calcium sand at the bottom. That’s when the light bulb went off in my head. The water cloudiness is “white” like the bottom sand….could it be cloudy because thousands of little tiny guys are bouncing around against the sand at the bottom, eating whatever’s in it (since it’s ground up from live coral…possibly some microscopic food bits there?), and eating it for calcium for their molting?

If they were out in the ocean they’d have “bottom stuff” to dig around in so maybe this is a good thing? Though it certainly makes it harder to see them. For whatever reason, baby fiddlers seem to like to “head for the bottom” – at least some of them. That happened last time with many burrowing into the gravel and dying. So I will see how this calcium sand thing goes. I am PLEASED though that the water quality is so good.

For today – I need to go feed them again and I will need to start raising the salinity to ocean level. If that IS what should happen, they should survive. If not, well, we’ll find out. One step at a time.

The Post – Scarlett O’Hara’s Moved to the Nursery

March 25, 2008

Yesterday was one week that we noticed Scarlett O’Hara was pregnant again.

Looking back over my notes on the first pregnancy – we noticed her eggs (2/17/08), then moved her about a week later (2/24/08) into the spare tank I’d just set up. Five days later she delivered. (2/29/08) The one thing we weren’t sure the first time was how long she was carrying the eggs before we noticed. From my log notes, I saw her on the 14th and didn’t notice anything. So, I expect it wasn’t much before 2/17 that she brought the eggs out on her abdomen. Given that, it appears it was about a two week gestation period.

If history repeats itself, 2 weeks will be about 3/31/08, next Monday.

With that in mind, I decided to move Scarlett O’Hara to the nursery. She seems calm this time, doesn’t seem disturbed by the calcium sand, sat under the water filter for a while, then moved toward the side of the tank and greedily went after the shrimp pellets I dropped in.

Since I can’t be sure when the eggs will hatch, I will shut off the water filter today.

Yesterday’s water parameters show both the main aquarium and the nursery aquarium to be about equal. No nitrates in the nursery yet, but moving Scarlett into it should kickstart the nitrogen cycle; I did drop in some shrimp pellets into the nursery the other day, just so “something” organic would be “rotting” in there and feed the nitrogen-fixing bacteria. Hopefully that will be enough to do the trick.

Yesterday’s parameters:

Main aquarium (before moving Scarlett):

Salinity 1.0115, Chlorine 0, Alkalinity 300, Hardness >300, Nitrites 0, Nitrates 20, pH 7.8-8.0

Nursery aquarium:

Salinity 1.013, Chlorine 0, Alkalinity 300, Hardness >300, Nitrites 0-0.5, Nitrates 0, pH 8.2

I have brine shrimp eggs though I won’t start hatching those until the fiddler babies are born. According to the package they take about 24-36 hours to hatch. I have something called “San Francisco Bay Brand: Brine Shrimp Hatch Mix” It has eggs, sodium chloride and magnesium sulfate and you just add a liter of water. I have a container with an air bubbler to put the mix in. No heater though. Just not going to spend another $30 or $40 for a brine shrimp heater. The kid at the pet store who has a marine tank and raises brine shrimp for his fish told me there’s no reason you can’t hatch them at room temp. He does it all the time. I’ll let you know how that works. I don’t know how many shrimp I’ll get in one of these packets. There’s three packets to the package. If needed, I’ll go back to the aquarium store and just get the larger container of shrimp eggs.

If you want to see some good instructions on hatching brine shrimp, as well as some pictures of the shrimp as they go from eggs to the tiny shrimps, click here for the San Francisco Bay Brand website.

In any event, I have the Kent Marine “ZooPlex” product to feed the babies for the first few days until the crab larvae are large enough to chase down live brine shrimp. This food is made to work well for invertebrate larvae and is considered a good brine shrimp replacement. It’s available at PetsMart. Again, we’ll see how it goes.

The Post – Update Time – Fiddler Pregnancy and Book “Delivery”

March 22, 2008

Well the fiddler crab, Scarlett O’Hara’s pregnancy progresses well. I am through “labor and delivery” with Under the Pier’s second draft, and we had an RIP moment for my laser printer, which died trying to print the last two chapters of that draft.

Now, to expand on each just a bit:

Scarlett O’Hara is busy eating or just sitting behind the air filter, in the main fiddler crab tank. Her pregnancy progresses with no odd happenings. Her “nursery” tank is doing well – water parameters are fine and salinity was down to 1.012 when I diluted the water, earlier in the week. I will recheck water parameters and salinity tomorrow in the nursery tank. If they are fine, I will most likely move Scarlett over to that tank Monday or Tuesday. We first noticed her carrying eggs on Monday the 17th. On Sunday the 16th, we saw no evidence of eggs, but that’s when she was spending days living on top of the water filter, sitting in the water currents. So best guess here, is that Monday will be one week. The last time she delivered her babies, it was just about two weeks. So I will move her to the nursery early this coming week. Also, I will shut down the water filter again and just leave the air bubbler running.

I picked up eggs and supplies to hatch brine shrimp and will talk more about that tomorrow. I also picked up a liquid food geared toward larval invertebrates, that is a good brine shrimp substitute. NO MORE LIVE PHYTOPLANKTON. I’m hoping that sticking to the zooplankton food approach will work better and not end up with high nitrites that kill off the babies. So more on this tomorrow and this week.

I spent most of the day on Good Friday, polishing the last chapter of Under the Pier’s second draft. It is finished. Of course it needs more work, but at least now it is a real book. There are no giant piles of fix-it cards or empty places in the chapters where I still had to figure out something or add in a description. Next up in the project:

1) Continue on with the posts about writing Under the Pier – I left off on location as character and Part II of that coming up this week will be more info about specific locations in the story — which though fiction, are amalgamations of real places, as well as how I researched them.

2) I will be putting together the submission package for a couple of editors from last year’s Carolinas – SCBWI conference. These packages include three sample chapters, chapter summaries, and any other info I want to include. At least according to one editor. I have a “map of my story’s town,” a schematic of the diner and the diner area, a smaller map of the area around Max’s house, a schematic of Max’s house, a glossary, probably a bibliography of some of the sources including research papers and the researchers I talked to….and of course, this blog’s address. 🙂

3) Start draft three. This time, I can now read through “completed” chapters, and listen out loud to their rhythm, see where they bog down, see where they need more “sensory details” and also go through the large “revision” charts I made up to see if I’ve covered everything. A later post will cover what I compiled for those revision charts.

Re the demise of my laser printer – FRUSTRATING!!!! I was halfway through printing the last two chapters when it seized up and died. Now I can’t really complain. I’ve had that printer almost 7 years and have printed thousands of pages. I got my money’s worth out of it. I was just hoping not to have to a) deal with buying a new printer just to finish printing my book and b) spend the money now. But…. c’est la vie. We now have a new HP Laserjet P3005dn. I need to make it my friend. 🙂

Anyway, that’s the state of affairs here. Oh, and also, given the impending draft three of the book, I need to get going on “Creature Features” So stay tuned!