I started this season with about twenty test strips and was planning on buying a real test kit. Money has been tight so I have put off buying a test kit and probably will not until next year. I have not tested my water since about July 15. I just keep on adding about 14 oz of bleach each night. I have a 15'-4' Intex. I have two type a cartridge filters in parallel that run 12hr a day. My water is very, very clean and sparkly. I wonder if my pool is easier because the water is never over 80 degrees. It is usually between 72 - 78 degrees. I would think that warmer water has faster chemical reactions and algae will grow easier.