Thank you all for your comments and sticky votes!!!!
Originally Posted by Laki
Interesting point you made about the gas exchange Hallyx!! I know the disruption at the surface of the water caused my old VT to nip his fins bc he couldn't bubbles.
I have sponge filters in 3 betta tanks, a 2.5, a 5, and 2 in my 10 gallon and I have had no problems with either my fish or plant growth. As long as plants get the right light and regular water changes to replinish minerals in the water, they usually do fine. My 75 turns over water at the rate of 10 times per hour and it's like a jungle in there that I have to constantly trim back.
This is a picture of one of the two homemade sponge filters in my 10 gallon. I put two as I plan on dividing the tank soon.