Who Gives A Fish Forums

I'll grab a finer sponge and a breeder box tomorrow. Appreciate the help, everyone.

Thanks for the tips. The sponge is medium pore, so maybe that's the issue. Water's soft, around 3 dGH. I'll try a finer sponge and reduce the flow.

My discus fry keep getting stuck in the sponge filter. They're about 2 weeks old, in a 20-gallon tank with a sponge filter, temp at 84°F, and I do 50% water changes daily. Anyone know why this happens?

Thanks for all the suggestions! Gonna grab an Eheim Jager and a backup thermometer. Appreciate the tips on redundancy too—might add a second heater later.

Setting up a fry tank for my Discus and need advice on heaters. Current tank is 20 gallons, bare bottom, sponge filter, temp at 84°F. Heater I have is sketchy, keeps fluctuating. What's a reliable brand for fry tanks? Prefer something with precise control.

Thanks for the input, everyone. It's clear there's a lot to consider beyond just dropping them in a tank.

I've seen a lot of new keepers make the same mistakes with their bettas. What's the most common issue you've noticed, like small tanks or overfeeding?

Never kept wild discus, but my captive bred are doing fine. Tank's a 50 gallon, with a hang-on-back filter and no plants. I do 30% water changes weekly, and they're growing well. Feed them flakes and occasional frozen daphnia. Not sure I'd risk the wild ones given how sensitive they're supposed to be.