The Post – A Short Fiddler Update

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……

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