Looking for help. I have a 30 gallon aqaurium that has 3 emerald gouramis, 2 pakistani rainbow, 1 pleco, 1 arrawana, and had 1 chinese algae (now parted). Planted tank with CO2 System and gravel substrate. Running a Fluval 404. I had a very healthy tank.
Problem is that 1 of my 2 kids ( 2 + 4...