A picture is worth a thousand words . . .

[ChuckD]

Two thoughts.

Could it be that the type of sand is not correct for pool filters, that is why the pressure readings are so odd? The other thoughts on the filter are also strong possibilities, such as too much algae, broken laterals, etc.

Would it not be easier to just drain the pool and start from scratch?

I say stay with it! Our whole city's rooting for you Pam! It was on the news last night!
OK, not really but I'm with staying with it. What you're learning now would not happen if you just dumped it and refilled. You'll keep this experience in your head and in the not so distant future it'll be there for you, instead of having to extract it from this forum.

My US$0.02: Fix the filter. There's definitiely something wrong, but mine's a DE so I have no specifiic advice. Just fix that first.

Then, forget the Clorine until you are positive what your pH and Alk. numbers are. As has been said, high Cl will distort pH. Forget it. Let it go. Fix your pH/Alk.

Then shockshockshock (and CYA too).

C.

[Pamsel]

Well, I wanted to let you all know that I have attained success in my fight against my green pool! I actually am going to post the pictures as a mustard algae thread so that others fighting this can find it easily and maybe be helped.

Thank you all for your help.

[mbar]

Hip, Hip, Hooray!!!

[Pamsel]

Marie!

I do have some staining that I might go to work on soon. Right now, I just want to enjoy the pool. May ask you for some advice about removing the stains later.

[mbar]

Just enjoy - you can always get rid of the stain later - it isn't hard, but it will mess with your chem levels again. I am soooo happy for you.

[Pamsel]

I have posted pictures in the thread "My mustard algae battle and victory" of the green pool and the steps to the now sparkling clear pool.

[JimBurnett]

I just love a happy ending. I knew you could do it!