I have a 1100g pond stocked with koi.
I have battled algae in the past, with my UV filter being the most effective way of clearing it up. In the past I have been able to flip on my UV and within 3-5 days its crystal clear.
About 4-5 weeks ago the water was looking pretty green, and it was starting to warm up here in ohio, so I did a 50-60% water change (first since October/November) sucking up as much junk off the bottom as possible.
The water was obviously still green after that, so I put on the same UV filter that I always have, which had the bulb replaced at the end of last summer, so that shouldnt be the issue. And i check the pump daily for clogs and other problems, and its working just fine.
The algae is growing on the sides and bottom, on my filter hose, ect.
Its green not the black algae, and its pretty slimy, maybe 1/8" thick all over everything, as well as all of the water being green. The pond is 2.5' deep and its all green, but I can only see to maybe 18" down most days.
Anyhow, since I put the UV on, I have seen a tiny bit of improvement, some days it looks better and some days worse ... and like i said before, usually its crystal clean within a week. (its been so bad in the past that i literally couldnt see 3-4" deep, and within the week its been clear as glass)
In the past i've also tried using algae killing chemicals without much luck (basically no O2 in the water
) so i would prefer not to go that route. But if that is the only way, how do i make sure that i am oxygenating the water enough? The pond is 1100g (16 x 4 x 2.5 deep) and it runs through my filter, through my UV, and out a PVC return thats 3" diameter at 2000gph so it agitates the surface pretty well.
Lastly, I also thought maybe I should just cover the whole thing in plywood, so no light gets in for a while? Would that work? And if so how long should it take?
Thanks
I have battled algae in the past, with my UV filter being the most effective way of clearing it up. In the past I have been able to flip on my UV and within 3-5 days its crystal clear.
About 4-5 weeks ago the water was looking pretty green, and it was starting to warm up here in ohio, so I did a 50-60% water change (first since October/November) sucking up as much junk off the bottom as possible.
The water was obviously still green after that, so I put on the same UV filter that I always have, which had the bulb replaced at the end of last summer, so that shouldnt be the issue. And i check the pump daily for clogs and other problems, and its working just fine.
The algae is growing on the sides and bottom, on my filter hose, ect.
Its green not the black algae, and its pretty slimy, maybe 1/8" thick all over everything, as well as all of the water being green. The pond is 2.5' deep and its all green, but I can only see to maybe 18" down most days.
Anyhow, since I put the UV on, I have seen a tiny bit of improvement, some days it looks better and some days worse ... and like i said before, usually its crystal clean within a week. (its been so bad in the past that i literally couldnt see 3-4" deep, and within the week its been clear as glass)
In the past i've also tried using algae killing chemicals without much luck (basically no O2 in the water
) so i would prefer not to go that route. But if that is the only way, how do i make sure that i am oxygenating the water enough? The pond is 1100g (16 x 4 x 2.5 deep) and it runs through my filter, through my UV, and out a PVC return thats 3" diameter at 2000gph so it agitates the surface pretty well.Lastly, I also thought maybe I should just cover the whole thing in plywood, so no light gets in for a while? Would that work? And if so how long should it take?
Thanks
