Just wondering how the OP's system is doing - any loss of flow issues over time due to bugs benefiting from the partially aerated substrate? This may be pure genius. I just bought a Spec V and want to try this out - although some additional means of surface movement may be required for "normal" fishes.
Also, I assume the best substrate to use is an inert, no-fines, substrate...either gravel or sand (but which is prefered)?
Last edited by wintermute; 07-08-2013 at 10:26 PM..
Reason: adding questions