[i have crabs]

for the algae/cyano problems it shure looks like calgary tap water to me,have you tested your tds in the last while
i dont know squat about sps but is the pump oil filled? because if it was leaking what was it leaking into your water, the insides of that pump didnt look reefsafe to me.
i wouldnt look into dosing a million different things to solve something untill you knew what the problem was forshure.