Jul 31, 2003, 1:51 AM
i've a 800 gallon pond filtered by a fibre glass filter, 6ft length x 1.5ft width x 3ft height with 4 chambers, each 1.5ft x 1.5ft x 3ft depth.. in the current arrangement, water enters from the top via a rainpipe, onto blue jap matt, then green jap matt, in the first chamber.. then in the 2nd chamber, water from the bottom would go through corals.. overflowing to the 3rd chamber on the top, through sea shells, and then going from below to the 4th chamber which is 3/4 full pack with bioballs, and on the top a bag of shells to keep the balls submerged.. the current problem i have is that, the 1st chamber keeps getting choked after 3 days (max) and the water simply overflows to the 2nd chamber, by passing the mechinical filtering by the 1st chamber of matts.. no matter how i arrange, green, then blue, or blue then green.. it gets erm.. not entirely correct to say choked, but water flow reduced in such a way that water overflows to the 2nd chamber, causing the remainding 3 chambers to turn dirty.. i happen to come across this posting and wonder if anyone can suggest any better arrangement to maximize bio filtration, and yet maintaince kept to the minimum.. i have to spend 30mins every 3 days to clean the top few layers of blue matting so that the water doesn't overflow to the other chambers. would rearranging the matts so that the water flow issn't against it help in reducing maintaince? water clarity is crystal.. the pond gets 6hrs of direct sunlight a day, currently there are 7 40cm kois, and 11 10-20cm kois.. aerration supplied by a waterfall, and additional air pump into the filter chambers and pond.. erm.. pond is about 4years old now.. any other information required? read about the brushes, but no idea how it works, do i get one giant brush and stuff it in the first chamber, or many small brushes in one chamber? when cleaning, if u remove the brushes out to wash, will some of the dirt drop back into the filter? is it effective? roughly whats the cost? thanks for going through my post and offering advices in advance.