The pump goes 350gph. When I put the UVlight on it, I had to disconnect the filter. There are a few little clumps of dead algea on the surface and I'm skimming it off as I see it. I have a few floating plants on the surface and water lilies in the pond. There is 15foot of pipe going to the Light and 6feet going out from it for a water fall effect. Was I suppose to keep the filter on there with the uvlight? It's putting clear water back in the pond, you can see it's clear. It was really green. It's not string algea or the other kind people asked about, it's the 3rd kind. I don't remember the name. But it does look like it's getting better. I was just wondering about how long it would take to clear up, if it takes a while or sooner. I'm fixint to make a canopy to go over my smaller pond covered with vines to put some shade on it to help keep the algea down and thought about letting the water pump into the larger pond if this clears it up pretty good. It will all circulate through the uvlight.
Algea problems-HELP
You may never get the algae cleared up with that low a flow rate. The algae can reproduce faster than it passes by and gets killed by the light. For 2000 gallons you need to pump through the filter at least 1000 gph. No wonder you've got green water. Yes, you still have to filter the water AND have the UV installed. You need a pump that can push 1000 gph hr at 21' of head. You need a filter that can filter 1000 gph.
Edited to add: A minimum of 750 ghp.
This message was edited Jun 21, 2009 12:07 PM
I too suffered with the pea soup green water from algae and couldn't see my fish. I bought a uv light/filter tank combo that can be placed inside or outside the pond, and the water was crystal clear a week later. I purchased mine from Lowes for $99, and it was worth every penny because one year of barley bales would cost me that easily from our local nursery. The fish and frogs also seem quite happy, and I'm happy that I can now see them all when at play besides just when they come up to eat.