December 01, 2015

Pond Q&A of the Day

Question #1:  

I have heard that you can use horticulture corn meal to control algae in ponds. Have you ever tried this?

I currently have an 8,000 gallon pond and fight hair algae until my plants get started, then it seems to go away. I do not like to use chemicals in my pond If I don't have to. Can you suggest any better way?

Answer #1:

I feel as you do. I do not throw chemicals into my pond, even salt, unless I know for sure what I am treating and there is no other way. But I have an affinity for natural products and bacterial additives to help stabilize the pond.
For my own pond, I use the Microbe-Lift Barley Straw concentrate because it makes a big difference in water clarity. The horticulture corn meal probably works on the same premise by sequestering excess nutrients that would feed the algae. But I have never heard of using it before in ponds. A UV light is really the best way to control green-water algae, although string algae will not be affected.

I have never heard of using it before in ponds.

- Carolyn Weise

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Question #2:  

I am currently building 3 concrete ponds measuring 2x5x1 metres side by side and I intend to stock it with 2,000 fingerlings each as I was told that 200 fishes can be stocked per square metre.
What type of aerator do I use to get the best result.
Is stocking 2,000 fishes to grow out ideal? What are the pros and cons? Please offer the necessary advice.
- Thanks

Answer #2:

 I am not into construction, but I will share what knowledge I have with you.
A couple of things on concrete ponds: First, after construction is completed, with rebar reinforcement and preferably a liner in there somewhere to prevent future leakage, be sure to wash the concrete with muriatic acid, then flush well a few times with fresh water.

After that is done, you can use Dechlorinator to neutralize any chemicals in the new water. I would recommend using good aeration and filtration for the fish you intend to grow out.

For good water movement you may wish to install PVC pipes along the bottom of the ponds from the filter to bring clean water into the pond through the bottom.

I would also use the aerator at the beginning of this pipe, to aerate and circulate at the same time.

MacArthur Water Gardens has excellent pumps and Aquabead filters to handle the fish load.

You didn't say what type of fish you are growing, but I suppose koi would outgrow these confines in one year. I hope you are good at culling.

- Carolyn Weise

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Posted by bfogle at 08:55 PM | Comments (0)