I've got a pond with a bog filter, and the water is crystal clear with no ammonia, no nitrites and no nitrates. I'm only just about to start feeding the fish as water is warming up so I expect the nitrates to rise. This should hopefully help the plants which are looking yellow. The thing is, that I thought string algae and other goopy algae forms when there is excess nitrates which allows the algae to thrive. How would I battle algae when nitrates are already too low?
Taken a couple photos below, but I had already cleared most the algae from the bog which is where it mostly looks bad.
Taken a couple photos below, but I had already cleared most the algae from the bog which is where it mostly looks bad.