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Discussion Starter #1 (Edited)
I think I'm overstocking this cup. About 30 3-4mm fish in a 500ml cup. That's about 4 inches of fish in a cup. I don't have a heater or filter either.... No baby deaths yet. Vacuumed these guys out of my tank during a water change. Feeding on powdered flake and boiled egg yolk. Shaken, not stirred :). This is my first shot at raising these little guys. Any suggestions or lessons learned would be appreciated!
 

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The inch per gallon guideline is for beginners, keeps them from overstocking. It's nice to start out in fishkjeeping with as few problems as possible, an inch of slim bodied fish that grow to no more than 3" per gallon of water is easy to remember. All the new things that need to be remembered when starting out can be overwhelming, this guideline is an attempt at simplifying it.

If you're breeding you're a step beyond beginner. Many people as they advance go well beyond the inch per gallon deal, sometime 2-3 times beyond. That guideline doesn't apply in your situation. With fry you'll want to change 50% of the water a few times weekly for the first 2-3 weeks, back off a bit after that, soon you'll be putting them in a larger tank.
 

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My only experience with fry was with winter flounder back in grad school, but we used a much higher density than this with no problems. We could push it a bit further because the water temperature was so low (4 C) -- these were *winter* flounder, after all, and they spawn late December - early March in the Eastern US. But even so I think you'll be fine. Just keep up the water changes, and make sure they don't have uneaten food lying around.
 

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Discussion Starter #5
Well, I had a bright idea of putting them in the tank with a breeder net box and they were doing well until the dwarf gourami figured out that he could suck them out through the net when they were swimming by the edges near the mesh.... DOH! I got another batch and they are about 2 weeks old now and growing well.
 
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