Originally Posted by Michael37090
First off, thanks for all that post here. I have learned a lot.

This is a new pond. It is about 1+ years old. There are very little nutrients. I did the aluminum sulfate lime thing again this spring, worked great. With the water overly clear, I decided to sink a bucket of 15-15-15. It was in there about a week before this bloom. I don't think the 3 gallon bucket did this. Not much was gone when I pulled it out.
I think the bulk of this is fertilizer runoff from where I am trying to grow grass. I used probably 4 bags of triple 15 and 3 bags of 46-0-0.
It has been raining and overcast the last few days. This bloom has gotten worse the past 2 days. What is it going to do when the sun pops out tomorrow? What are my options? It is also in the spillway.. See the pictures below.

It is loaded with fish. I do have a fountain.

I think your pond has way too many nutrients in it and no plant life to utilize the nutrients.

My advice to you is to do the aluminum sulfate/lime thing again and this time do NOT add any fertilizer to the pond after the treatment.

Before doing that I would hit about 1/4 of the pond with Cutrine Plus Liquid mixed according to the label. Keep the aerator/fountain running 24/7 and in 3-4 days hit another 1/4 of the pond, and repeat until the bloom is reduced. You can have a fish kill at night when all the phytoplankton is using O2 instead of producing it.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).