you can get 2500 mix is the lowest strength, and just fine for 99% of pool jobs. I had to pump and #84 mix from this supplier is what pump guy wanted, I had no problems with it as I didnt have a choice it HAD to get done before this rainy week lol.
Poolguy Im gonna do Verm I think. I may have groundwater come up down the road so I think its safer than a masons mix bottom. My neighbors both have pools to each side, one guy is a few feet above me and never had an issue, but guy to left of me is on my grade but has 8' depth I only have 6' but he said twice in 20yrs he had liner float and he had pool installed and said they pulled out tons of material too like me and did alot of stone. Im low inside pool I actually had the mini excavator inside the pool last week and took out the top layer of muck and some extra to be able to put stone in to tighten up the mud. It worked pretty well in overdig, and i have rolls of soil stabilization fabric for under pavers/roads etc. that is a last resort. I plan to put a 10"sump pit next to my deepend w clean stone for a sump pump thats going to be wired and piped all underground w skimmer lid access. I am toying with idea of laying sdr weeping pipe on top of footers and running it to sump pit. I did a mini pit in deepend w filter fabric and clean stone and it lasted 2 days before the filter fabric got clogged w mud and is barely perking into sump bucket now. So I dont know what to do w a drainage system behind walls, if i do clean stone for all backfill I think its gonna clog up and may cause settling of dirt under patio. If I wrap in filter fabric and do clean stone I think the muck will eventually clog. I can do road QP/road base but would have to run plate over it and that wouldnt perk.
Poolguy Im gonna do Verm I think. I may have groundwater come up down the road so I think its safer than a masons mix bottom. My neighbors both have pools to each side, one guy is a few feet above me and never had an issue, but guy to left of me is on my grade but has 8' depth I only have 6' but he said twice in 20yrs he had liner float and he had pool installed and said they pulled out tons of material too like me and did alot of stone. Im low inside pool I actually had the mini excavator inside the pool last week and took out the top layer of muck and some extra to be able to put stone in to tighten up the mud. It worked pretty well in overdig, and i have rolls of soil stabilization fabric for under pavers/roads etc. that is a last resort. I plan to put a 10"sump pit next to my deepend w clean stone for a sump pump thats going to be wired and piped all underground w skimmer lid access. I am toying with idea of laying sdr weeping pipe on top of footers and running it to sump pit. I did a mini pit in deepend w filter fabric and clean stone and it lasted 2 days before the filter fabric got clogged w mud and is barely perking into sump bucket now. So I dont know what to do w a drainage system behind walls, if i do clean stone for all backfill I think its gonna clog up and may cause settling of dirt under patio. If I wrap in filter fabric and do clean stone I think the muck will eventually clog. I can do road QP/road base but would have to run plate over it and that wouldnt perk.