Dirty tank... don't understand
I have 2 tanks-- a 29 gallon and a 5 gallon.
The 29 gallon has been using the same gravel for 3 months and has more than 15 fish in it that whole time.
In contrast to this, my 5 gallon only has one Betta in it and I changed the gravel last week.
In 1 week my 5 gallon has more fish waste in the gravel than the other tank with 15+ fish in it (that tank also has a Betta)
does anybody understand this?