We bought a house last summer with an in-ground pool. We used The Pool Calculator all summer to try to determine what to use for chemicals to balance the pool and were constantly having issues with low chlorine and CYA, along with constant algae growth. We have talked to our neighbors who also have an in-ground pool and found out that the pesticides that are frequently sprayed on the apple orchards near our yard "leech out the chlorine". Does anyone have experience with this and know how to adjust what we use for chemicals so that the levels will be where they need to be?
Our pool was just opened last Wednesday, 1 gallon of liquid shock was used, as well as 5 of the 3" trichlor tablets. Another 2 of the 3" trichlor tablets were added on Saturday as most of the original 5 were already dissolved. On Sunday, the chlorine level was at 0.5 ppm and the CYA was below 20 (the lowest reading on the TF100 test kit). Any advice would be greatly appreciated.