Pond Boss Forums MANAGING AN EXISTING POND Fertilization will fertlizer help clear a pond

It is up to you. If you have a lot of clay around the pond, gypsum will be a temporary fix until the next rain. If you have livestock walking around the pond, no chemical treatment will help. But if it is as sandy as you say, you might have more luck. For a 0.5 acre pond it won't take that much gypsum. If you want you can give it a try. It is possible that you could clear it up w/o further applications. I want to warn you that gypsum sometimes doesn't work well and alum is necessary. I would suggest getting a water sample and trying it out. The fertilizer store will let you have a little of both. Alum will work the best, but gypsum may work and not reduce your total alkalinity. Good luck