I Have a 90 Gallon Fresh water tank and the hang ove rthe back filtration was costing me almost $30.00 a month so i took it into my own hands. I bought a 10 gallon tank for $10 buck and some glass from home depo and a pond pump from home depo and a bottle of silcone and some pvc pipes and parts all putting me around $60 dollars. Using the Diy pvc overflow The final out come is a filter that flows around 400 gallons per hour with an under tank refridgerum. all my my tank paramaters are better than ever and its been running for a month or so now and filter cleaning and replacement is as easy as just buying the filter padding for 1.50 per sq ft which costs me $3.00 a month to maintain my tank filter



