If Aquarisol gets rid of hydra quickly without harming eggs or fry, that would be great. They are always available at Wal-Mart or LFS inexpensively. I was wondering about it because it is copper based and I understand that angelfish fry are sensitive to copper at 0.5 ppm level. I thought much smaller apisto fry might be even more sensitive. Should I use an activated carbon or something that absorbs copper after hydra is gone? Tomoko ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.