Join Date: Jul 2018
Location: San Gabriel Valley, Southern California
My cheater way is to use a slightly oversized canister filter and turn down the flow.
Eheim ECCO Pro 200 (about $100)
has 2 baskets; use one for sponge/filter floss, and the 2nd for seachem matrix.
Flow is 160gph, so not outragous, and there is an ouput flow control valve.
A basketful of matrix will bioprocess much more livestock than you now have.
My other bio-load multiplier, is a small quiet, clip-on fan I use to blow across the open-top tank, to maximize gaseous exchange at the surface.
Doing so will also lower the water temp by 6 to 9 F, which has to be taken into account (in my case, I also needed the cooling).
Lastly: when you use tech to overload the aquarium, bad things may happen if the power goes out - leading to the need for an uninterruptible power supply. The Eheim listed above uses only 5w, comparable to your 6watt Aquaclear 20. Even a small 500va unit will last seemingly forever if you only plug the 5w main filter into it.
Last edited by psychofisho; 07-06-2019 at 12:51 AM.