Thread: Algae advice

Looks like blanket weed that's broken away from the pond walls. Maybe the fish are nibbling at it and pulling it off. If your filter won't take care of it, then maybe you will need to dose with a blanket weed treatment. My preferred choice is Resolve.

Exactly as Gary said, mine are doing exactly that and the algae on the pond walls are full of black fly larvae etc.etc. so they're getting free food all day, protein and veg but it makes a right mess of your water

The 18W UV should be plenty for 3000L, more UV won't help a lot, the lumps or clusters of algae you're seeing are already big enough so the filter should be able to trap them, what filtration have you got?

Trouble is the algae clumps are holding oxygen with so floating - not going down the bottom drain. I have a separate skimmer line, grid on the inlet then a basket - to another basket before the pump, returning to pond via bakki shower, the returning water is crystal clear but the grid and baskets are getting bunged up at a alarming rate ATM.
"It is estimated that photosynthesizing algae are responsible for approximately 70% of all atmospheric oxygen. Algae produce oxygen via photosynthesis, releasing oxygen into the atmosphere as a by-product of the process. This process typically occurs during the day when light exposure is at its greatest."