We recently built a large 1/4 acre pond in our yard. We lined the walls with limestone boulders. After 3 months or so, in the heat of summer we had our first string algae bloom and it’s pretty big. I did a water quality check and our ph is near 5, ammonia and phosphate around .25ppm, and nitrites are zero. We have been putting in beneficial bacteria and muck remover but maybe not enough for a large pond especially being a new pond. Water clarity is pretty good outside the string algae. My questions are what do we do from here? I’ve ordered granular algacide, plan is to treat and remove algae. Then to really boost the beneficial bacteria dosing. The problems with that are the doses are hard to figure out for larger ponds and I’m not confident multiplying the doses simply based on gallons and dumping in $500 of bacteria per dose. Also, I’m not sure why our ph is so low, maybe from the limestone? I don’t know our exact pond size but I’d guess somewhere near 60000 gallons. Goal for the pond is to want to swim in it and snorkel with the local fish and turtles.