I have a 28-gallon tank that's about a month old. We have the pH and nitrate levels indicators and everything seems okay.
After about a week in the tank, our black mollie gave birth to ten babies which I put in a baby safe net and they have been doing well and getting really big.
I didn't change the bio-filter as quickly as I should and some algae had built up around the sides by yesterday morning. I changed the filter, took a scrubber to it and the Chinese algae eater went to work so that's been clearing up.
We've been reading up on the Chinese algae eaters getting hostile when they get older, so we got a Plecos yesterday afternoon in hopes to exchange the Chinese one eventually, but it was dead by nighttime. Our first fatality with really no explanation.
This morning, the black mollie mama looks like she's struggling. She just does not look good--hardly swimming. I did get her to eat a little. She also looks white on her gils and her belly--not spots, just white. Also the pineapple swordtail (female) is just sitting on the bottom breathing heavily. She has no white anywhere. The bully dalmation mollie is doing fine, the two guppies are fine, and the tetras are fine. The baby fish seem great, too. The only time the mama mollie will swim is when the bully charges at her.
Any guesses as to what is going on? I was hoping the Plecos' death was a fluke but maybe he was sick and got the others sick? I just don't know. I think the mama fish may be ready to have some more babies, so I'm really sad.