dont forget to give me rep if i helpeddepends on the size of the rez i beleive most people use a 365gph
http://www.hidhut.com/catalog/ecoplus-submersible-pump-eco-264-gph-p-423.html<<<should be good for 30 maybe even a smaller one im not surethe res will be either 30 or 60 gallons depending on if i can find something big enough for a decent price around here. if you can maybe give me a pump size for both. thanks, the rep will be coming