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Message: [QUOTE="brokensword, post: 366141, member: 3486"] you could get one pump for the pond, one for the bogs (or use a T and one pump). Pushing the water fast through a bog won't filter better, just the opposite. You could use one large pump and T it off, providing water to something like a waterfall that feeds directly back into the pond and to your bogs at a reduced rate. Without some sort of mech filter ahead of the bog feed, your bogs will be susceptible to clogging (something I learned first hand), unless you have very large bogs (like addy has, and hers is fed from streams and secondary ponds which do a lot of pre-filtering). Yes, the rule of thumb is 1-1/2 times overturning the water. Might be better to have two pumps; in case one goes down, you'll still have something moving water in the pond. [/QUOTE]