Who Gives A Fish Forums

joshito wrote: ↑Sun Aug 31, 2025 10:19 pm Yo, my LFS said hardness don't matter if pH is low. That legit? Got a 40-gallon with 4 juvies, sponge filter, and they're growing slow.

Nope, hardness affects osmoregulation. Juvies need soft water (GH 1-4) to grow right. Upgrade that tank size too—40's tight for 4.

Beef heart's messy but worth it. I rinse my filter media monthly in tank water. Also, angelic, test your tap's TDS—might explain the dull colors.

Wild Discus? Different ballgame. Tank-raised can adapt, but why risk it? Soft water's cheap with peat or almond leaves.