I like the idea of the bacteria, but based on these prices, even for my small pond, I'd be looking at thousands of dollars to treat it.
The greenclean obviously does not fix the problem, but at about five bucks per application, vs. $2,000, it seems like a pretty good option. The FA in my pond covers maybe 5%, so it's not a major issue.
Are there any bacteria products for larger ponds that won't break the bank?
