Question about Aquascape Designs Aquascape - AquaForce Solids Handling Pump - 1500 GPH Submersible Pump

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Several years ago I jumped right into building a koi pond in my backyard. I have a rock waterfall about 3 feet high. I did not put a filter, or skimmer in. I first used a 3/4 sump pump in and that worked fine for a while. I went to a flojet pond pump after several tries. That works well for quite a while and always gunks up and slows down to a trickle. Each spring I get into the pond and scoop up a lot of the debris. That helps, but doesn't solve the water flow problem. I now am thinking that a solids handling pump may solve the problem. The pond holds about 6-700 gallons. Any ideas? THANKS from Memphis

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The trick to a koi pond is filtration and the pump is part of it. What you want is a pump that will move the water about once an hour. So a 6-700 gal / hr pump would be minimum. But with a 3 ft waterfall you may need a 1500 to 3000 gal/hr pump. The box will tell you the gal/hr at a 3' head.
Now how do you keep the pump inlet from clogging? How about we only pump clean water. You do that with a gravity flow settling chamber. You need a outlet in your pond going to another big chamber where the fish muck can settle to the bottom. You can put filter material across the settling chamber. Remember the wider and slower the water the better. The solids will settle by gravity requiring less filters or filter cleaning. So then at the top of this chamber you now have clean water from there you can pump. Also with the fish waste settled you won't be grinding it up into a pump making a fine slurry that is always perfect for a summer long pea soup algae bloom.
Now at this point you should spray the water out causing the most oxygenation you can. This is where the beneficial bacteria can turn fish ammonia to nitrates and then to the much less toxic nitrates that floating plants and others love to feed on creating a balanced pond. These bacteria are aerobic and want maximum oxygen in the water. So design the bio filter with a media that is light and has maximum surface area. Keep this area out of direct sun and dont let the water blast the bacteria off the media. From there let the water fall back into the pond adding even more oxygen. My 500 gal pond uses these ideas and I only clean the pump inlet and the prefilter 1 or 2 times a year and the biofilter has never needed cleaning. There are many ways to keep a koi pond but the closer you stick to these rules the healthier your pond and fish will be and the less maintenance they will need.

Posted on Nov 19, 2014

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NEED filter box to keep pond cleaner and pump healthier, the gunk will just build and cause pump loss and aggravation.

Posted on Jul 17, 2009


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