Sorry to hear issues with EI. I been dosing EI for 4 months, never had algae blooms that weren't due to other issues like CO2 or rescaping the tank without doing a water change. I have had over 100ppm of nitrates as well as i was dosing 2x EI on accident. Still no bloom. Its really dependednt on CO2, flow, and plant biosmass. If you dont have many plants or they arent that large, or have low light, EI might give you issues as youre just dumping tons of nutrients in. But seriously to get to that point, you would have little adding to that kind of tank in teh first place.