I'm going to try using Fiber Clear this year and the bag tells you how much to use depending on how many square feet your filter is. I have a Proline DE model 40 filter. It is 10 years old, and while the owners manual technically exists, finding it wold be better left to someone like Indiana Jones.
I measured the grids. there are 4 @ 8.5" x 12" and 2 @ 7" x 12". that equals 4' x 1' times 2 sides which equals 8 squre feet. Is this right? What has me confused is the chart on the bag starts at 24 sq feet. That is a long way from 8. If my math is right I can just use 1/3 of the amount in the chart.
It is a 15' round above ground pool if that matters.
Thanks for your help