Well, I just got done reading through about 6 pages of results and gave up after not finding much information to help... I'm in the process of digging my pond that is estimated at about 2,500 gallons. I need to seriously rethink my filtration idea (was going with a DIY 3-barrel bio-filter). The pond will be more of a water garden than a fish pond, but we do plan on having some goldfish in it eventually. I don't want a really expensive pump (I have the Pondmaster Mag 3000 in mind). I don't want a filtration option that is going to cost much more than the pump (say, under $200). I will be adding a 10-15' stream and a waterfall in the future, but that will be phase 2 of the pond. So, how would you guys meet my needs if I was your customer?