I just bought an I text easy set 18 foot 48 inch pool. It says on walmarts website it is 5,000 something gallons. I bought the hth 3-way test kit liquids. I just put a three inch tablet in a floater bc it was recommended to do that. I just opened the tester kit and it says for 5,000 gallon pools it is not recommended for skimmer tablets. Don't I need to use these tablets? Everyone I know that has a similar pool uses these tablets. Please help!