You cannot overdo the amount of UV you have on a backyard pond or water gardens but you can underdo it, and have too high a flowrate for it to be effective. Step 1: Manually remove algae from fish pond: To speed up your garden pond algae control efforts, start by manually removing as much of the algae from your pond as you can. If you’re having problems keeping your pond clear, and algae growth is not the issue (or if you’re not sure what the problem is), then I recommend testing the water.

For this reason, we’d recommend activated carbon over zeolite in most situations, especially if your problem is tannin-laden (brown) or cloudy water. If you must use mains water, warm it in the sun first and add in small quantities, to avoid a sudden temperature drop. UV clarification is the single most effective method of treating green pond water caused by free-swimming algae particles, especially if you have fish. Both chlorine and chloramine are potent disinfectants, and will cause severe burns to the gills of fish, as well as kill off your beneficial bacteria populations.Hydra Quartz eliminates string algae and slime by starving the weed and inhibiting recurrence for extended periods. Barley by itself cannot stop algae from growing, but can produce potent substances during decomposition which work as natural algaecides.

Melt some of the ice by placing a hot pan on the surface, or consider a bubble fountain or pump to add movement and raise oxygen levels. Or you can make your own DIY pond pump filter box using these super simple step-by-step instructions.It’s best to put your barley straw bundle in the pond near a fountain or waterfall where the water will flow through it. Fortunately, although the problem may look disgusting and daunting, with the help of a green pond water treatment, it is relatively easy to fix and even easier to prevent in the future.