We have been trying to open this pool for two weeks now. It is a Kayak 12x24, 8500 gallon pool with vinyl liner. This year we have a brand new Intex Sand Filter 2800 GPH. Over the winter our cover collapsed and pool sat uncovered for part of winter and through 5/25/16 when we began working on it. Our process since then in trying to resurrect it has been as follows:
1) Raise pH
2) Add Yellow Out
3) Superchlorinate with shock
4) Simultaneously vacuum, scrub, backwash, etc.
We have gone through this process twice. In the interim, nearly daily scrubbings and vacuuming. There is no more debris coming from the pool and the filter is smoothly running at great pressure. Now the fun part is that it's still green as evident in the pics I just had my husband take and send to me a minute ago. I did the Pool Calculator and we got more bleach and are keeping the chlorine levels high.
The readings from water test just now he sent were as follows:
Total Hardness: 100
Total Chlorine: 10
Free Chlorine: 10
Total Alkalinity: 120
Help, we are really not sure what else to do. I've looked into getting D.E. for the filter as maybe we've filled it with too much debris from all the initial vacuuming/cleaning.