I have an 18' round above ground pool with a sand filter. For the past three years it has been a nightmare of green water every other week or so. Before I got fed up and found this website the pool guy started me on EZ pool. That didn't work either. So, I want to take charge and do this cheaper and cleaner. The water is clear. I had the water tested today and here are the results:
TA (input) 97
TA (adjusted) 76
Calcium Hardness 336
The tester said I had slight levels of copper due to the EZ pool but I don't have the amount. She recommended that I put in 1lb of non chlorine shock. I am not adding anything until I get advice from all of you. I have the walmart tester reagent kit...I am ordering the one you have recommended. Thanks so much. I have read everything on this site. I am so hopeful that the rest of this summer will be truly an "easy pool" experience!