Glad to hear that, i just build another one ,in stand of 3 , only one ( bigger ) works great , i got 35 fishes , my NO3 close to 4 ppm, i still dose a little Vinegar ,until the Reactor fully take over, i keep seeds with some bacteria , until woks by him self , i use to have problems, with effluent , the 1/4 hose keep clogging the little adjusting valve , also those lift up pumps keep falling, then i decide to run a 1/4 inch hose direct from display tank by gravity , i put a piece of sponge around hose to make sure NO detritus will build up in the adjusting vale , so far works great , zero maintenance on reactor , mine is fully open on top , i use very small pump to avoid , worming up the water in reactor, also use low flow , powerful pumps , kill bacteria and worm up the water ( like those in market ) you know they are to large grope of Bacteria, aerobic and anaerobic , some need oxygen , second not, i guess works very well with the ones need oxygen , NOT to mention , those ( market) close loop fail so easy, i guess that way so many refers got discourage to use this kind the filter, i use dif. brands of bacteria, i love it.