There arent any otters in the lake and I dont know the alkalinity however I can get that pretty easily as we have a test kit for our aquarium... To me it seems like dropping 7000 3-5 inch bream wont hurt anything and would boost the forage quicker but also just need to keep pulling bass out continuously and remember its not a sprint. Father-in-law doesnt think we can balance the population out and grow 3-4 lb bass consistantly so its time to prove him wrong