Every time I go here they are always trying to sell me something expensive. Went here today to test my pool. It was tested and was advised that the ph was high. I asked how to lower it and I was recommended a product which costs $34.99. Not knowing anything about it I purchased it. Went to another pool store and saw another brand of the product which costs $8.96. WTF . Let me guess your products are supposed to be better . I call BS.