Why don't yopuu pond folks just infuse fresh water at a constant
but slow rate nd let the overflow bleed off? That's what poeple
with 100+ aquariums do. Then you barley need a filter.

Ever notice pics of discus breeders tanks that MUSt have the cleanest
water possible? They have like 1 sponge filter in a 60 gal tank. What
you don't see is the overflow and continuous water gong into it.

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