Water is awesome, we test all the time.
We are just beginners, so we have a community tank, 55 gallon, fully cycled...nitrates at 10-20ish, PH 7.4, Ammonia at 0, nitrite at 0
We did have 4 Mollies, Feather-fin catfish, 5 female bettas, and a peacock eel.
So we went and got 4 Gourami (2 powder blue and 2reds)
Day 1 added the four Gourami
Day 3 - Gourami 1 died (i thought we got a bad fish)
Day 4 - Sailfin molly, the only male (Capt Jack!) died (maybe he was old)
Day5 - three bettas gone and one on its way out. Somethings wrong.
I did not examine the fish that died until I saw the white lips/mouth on the nearly gone Betta.
Looks something like Columnaris?? Looks like we got it from the first Gourami that died!!! How do I treattttt!!!!! and where can I find it??
I have isolated the last betta :( and Im nervous the others are on their way out.