I have a 30 gallon tank with a hob filter that is sufficient for a 40gal tank . I have some live plants. I believe they are anubias . I have had the plant for over a year so it covers approx 1/4 of the bottom of the tank. In the tank I have , 1 Glo fish that is a tetra, 1 penguin tetra, 1 dwarf gourami , 2 Cory's, 1 small rainbow shark, ( it is temporary he's to small for my 125gal, he was getting picked on so I moved him till he is a little bigger) , 1 sailfin pleco ( approx 4 inches), and 6 Guppies. And please don't get on me about the rainbow I know this tank is to small for him but right now he's maybe 2" max and in my 125 tank the tiger barbs, and the silver dollars were roughing him up. I assume when he becomes more territorial he will be fine, but for now he just spends his time eating and swimming around and as far as I can tell he has not set up shop and claimed his area yet. Also I do water changes every 3-4 days, vacume substrate 2-3 times a month due to the waste produced by the pleco. So am I good with what I have stocked in the tank or should I consider a 5-10 gal tank for the Guppies . They are the latest addition
