Hi there! I’ve lived 10 years with a 100 y/o cement pond which I loved. We recently moved and while waiting to build my dream pond I’ve made a temporary pond for my couple of goldfish out of an old cast iron tub (approx 80gal). Of course I’m getting carried away and want to add a little waterfall. I plan on seating the 8in waterfall in a pot next to tub. I bought a cheap-o filter and fountain for the time being but know I need something stronger for the waterfall. I’m thinking like a 500gbh pump? You have to increase gph quite a bit for the waterfall, right? I have my old 1000gph external filter Can I use that or does the filter need to more closely match the pump? Is 500gph for the pump overkill? Appreciate any thoughts!
Bathtub Pond - filter too large?
- Thread starter Chelsy Williams
- Start date
TheFishGuy
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Nice little bathtub pond! as far as pump size for a waterfall goes, it depends on the width of the spillway. What would your spillway width be?
8 inches!
TheFishGuy
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I am sure others will pop in and give you much more technical advice, but for an 8 inch spillway something in the 1000 gph range will do you well. You could pair that with your old filter and have a great setup!
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I wonder if the amount of flow needed for a spillway that wide might be quite overwhelming for such a small pond ?
you might be right. Maybe I should look for something smaller.
TheFishGuy
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I had a 1200 gph pump and a 12" spillway in a 160 gallon stock tank a while back. it was deffinitly large, but I don't think it was too large.
TheFishGuy
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looks fantastic!