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I have 18 shrimp in a 90l tank. They have never shown much interest in any food I give them. I give them a pinch of spirulina every 3 days and three or four pellets of JBL Novo Prawn. I've tried blanched vegetables, hibiscus flowers etc and the ignore them all. Dies this mean they have enough biofilm? I have thousands of detritus worms, including some which are swimming about in the water column, which would suggest I am overfeeding, though this seems hard to imagine with the tiny amount I am putting in. A couple of RCS females are berried so I am reluctant to give up the spirulina as I don't want the shrimplets to lack food when they arrive.

I found it hard to feed the daphnia enough without polluting the tank so i transferred the daphnia to a plastic bucket

Yes to both questions.

It seems to make blue bolts and blue panda. None of the babies I saw had any red on them.

ok. 2 more questions: During "lights out" period, I have actually set the light to 1%, i.e. very dim. Mainly so the shrimp aren't stumbling around in pitch blackness. Should I have the lights turn completely off? Should I remove the hair algae that is growing on the glass? It seems the shrimp aren't eating it after all.