My current setup is a planted 75 gallon aquarium with only a sponge filter and a bubble wall for filtration/circulation. My ammonia, nitrites and nitrates are at 0, and I never had an ammonia spike when I had a massive bioload dumped on me by a friend. (Yes, my ammonia kit works, I do see spikes in my QT when I treat it with antibiotics.)
When I first set up, I had only the bubble wall. The sponge filter was added to take care of the fine dust stirred up when I move plants. (Didn't wash the sand before installation, paying for it now.)
I am currently having a green water problem, and considering fertilization and DIY CO2
. (Yes, I have plans that should manage CO2
for a 75 gallon.) It would obviously be fruitless to run CO2
with my filtration/circulation based off of an air pump, so I need to change.
Any suggestions for low filtration that won't break my surface tension, and uses washable media? (I used to love my aquaclear sponge media on my smaller tank.)
I'm thinking a small Fluval Internal using a sponge, with a powerhead on the opposite end of the tank? The fluvial would add the cabability to run carbon if I had to, but I think it requires the special carbon pad instead of loose carbon I already own.
The other alternative would be a powerhead with a foam prefilter?