Hi has anyone suggestions about this. Used this trough for 8 years without any problems. Early in this year had to remove large amount of algae but it has come back worse (like green candyfloss). Now cleared and drained it again, but before I refill, should I be doing somehting else. Trough in open (no trees around it) Thanks embee
When I clean my water tank (100 gal Rubbermaid) I use ~1 cup of bleach mixed with a gallon of water to kill any algae that has accumulated. In the height of the summer, I'll clean my tank once per month but much less often in the other seasons and only once or twice during the winter - being in the south, we get a lot of sun all year 'round.
Some people put a small amount of bleach in the tank to inhibit the algae and my tack shop has some pills that you can add to do the same but I haven't tried either.
BTW, I never let it get to the stage that you describe.
That's why I don't use a automatic float on my tank. My tank is in the shade, the more sun the more algae. When I fill my tank it last a day and half, at least once a week when it's about 1/2 to 1/4 full (low enough I can flip it over by myself) I turn it over and rinse it out with the water hose. It helps keep the tank cleaner not prefect and the water keeps the ground around the tank moist so it helps the horses feet also, since I'm in Florida where it can get real dry.
We don't clean water troughs. They are often shared with cattle so it's just not practical to clean them all the time. If you leave them the algae settles on the bottom leacing the water clear. Never had an issue. Our horses also drink from dams and creeks shared by stock, again never had an issue.