Hello guys. Uploading this video as I tried something new and couldn’t find anyone else who had done it. I have a 2000 gallon ponderium (aquarium + pond) directly under the sunlight with shade from the tree running on a nexus 220. Water quality was excellent because of the nexus but I was having a lot of algae. I added the sera Crystal clear medium in the nexus 220 and is been doing wonders. Just need a week and I have no algae.

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