Pond Boss Forums GENERAL QUESTIONS Help Aluminium sulpahte + aereation + algae bloom

Gerald, your pond guy is wrong on these chemicals. If the turbidity is from colloidal clay, which is common in LA, it may never clear.

I apply a LOT of Alum to clear ponds and there are no dangers when done right.

Here is a thread on clearing with Alum, and describes how to do a jar test...I will also private message you.

Alum kicks clay butt