The questions.. 1)What kind of algae is this? 2) is it dangerous? 3) how do I get rid of it? The pictures are taken close by the waterfall which creates bubbles. I have attached three pictures. If anyone wants the details about my pond... As of today, v Nitrate 0 Nitrite 0 Ammonia 0 pH 8.2 Pond is around 40 ft x60 but it's now about a foot low making it around 35x55 ft due to dry season Started this summer. Pea gravel covers the liner, have both under gravel filters and a sand filter. A waterfall and 75 ft of soaker hose buried under pea gravel with plants in the gravel take the water back to the pond. A few Lilly pads, cat tails, and and water lily's are in the water. It is teeming with life - a couple dozen bullfrog tadpoles, salamanders, frogs, water beetles, dragonflies, damsel flies and about 20-30 goldfish, and people who jump in to cool off. Only source of water is from rain via gutters and wate r we haul in.