i just recently designed a filter for my ornate monitor pool its 110 gallon and by not this weekend but the following weekend im going to take pictures as i build it and let everyone know how it works it is basically a pool filter which is were i got the idea but its all pvc pipe and i estimate only about 25.00 if you want to try it before then i can email you the general concept the most expensive part is the pump i already have one so that was not included in my 25.00 pipe filter design