So I live in a very tropical country, temps in the summer can get very high and water temps can go to 86 even 88. I cannot invest on a chiller, so the question is, can I still do DWC? Maybe using Hydroguard or Southern AG would solve it? I do have Southern AG available and growing in DWC right now using natural sunlight but it is the winter and temps are good but in the summer that's the problem.