Stains psi problems

[davidadavila]

well hellos guys IM glad i found you guys, i bought my house here in florida about a year ago and i cant get my pool going properly.....let me give you the stats the pool is 24x16 average depth is 5.5, my pump is a 2hp cartridge filter i have a high psi reading unless the filter is spanking new and then after a couple of weeks it goes back to 35 40psi i dont see the water circulaing well as with other pulls you can see the water go around and stuff...mine is kinda just stagnent no much going on unless i clean it and put it in , then i will circulate better for aout 30 min, i dont know if this is normal......., also i have a concrete bottom and there is these black stains that wont come out for anything in the world really hard deposits, im planning in my to empy the pool and pressure wash the thing a use that muriatic acid or what not......first time haveing a pool and im lost, ive been running the pool for about 8 hours a day so i dont know if that is a good idea as well, i try stuff that they give me at the pool place but it has not got rid of the stins .....what next???? awsome site hope to solve my problems

[Rosco59]

You don,t say what the size of cartridge filter you have ?
1. It might be grossly undersized and so the time between cleaning is just a function of the small size of the filter.
or 2. The cartridge itself is getting old and impregnated with dirt that is not easily hosed out. If so you should soak the cartridge in your laundry sink overnight with a cartridge cleaner additive.
3.A more expensive alternative would be to replace the cartridge filter with a sand filter.Much less hassle with a simple turn of the multiport valve allowing you to backwash the filter.

Regarding the black stains in the floor of the pool. It could be blackspot algae ,which you can attempt to remove through SUPERCHLORINATION. [a 10 times overdose of chlorine]