Originally Posted by
Matt24
You might consider partially covering your fry pool with plywood, a tarp or whatever to shade it some and keep the algae more under control. Some is okay, but not that large of a PH swing as you know.
Sorry to here the deformities have taken such a toll on your fry. But at least you have 300 left to watch develop. What varieties are they?
Deformities can be tricky. I once used two males and a female in a spawn and got head deformities on 100% of the fry. Some people told me that it had to be genetics. But I used the same 3 koi in a spawn in another year and got very few deformities. I am not sure what else was so different.
I typically get some deformities, but not all that high of a percentage. So it is usually not too bad. But in another spawn with different koi, there were a high percentage with crooked tails.