Problem only when pump running

[PoolDoc]

. . . MEANWHILE. . . order a Taylor K2006 test kit from Amazon (link in my blue signature block). You will need this kit to make things right. Read the "Best Guess" page (linked in block) for a part of the explanation why.

1. I'm not sure exactly what's going on. Some bits of your description don't add up -- but that's not uncommon: if you were a pool expert, you wouldn't need to ask us.

2. TEST the pool water and we'll know more. Otherwise, we're really just wasting time guessing without information.

3. REGARDLESS of the cause, chlorine will kill the algae.

4. Algae is NOT getting INTO your pipes from a crack or a leak.

Again, get us the basic info and we can start trying to figure just why this is happening. But I'm not going to a lot of time into speculating unnecessarily, when we're still lacking basic info.

Any additional help would be appreciated

You've gotten the help you need, but it's up to you whether you take advantage of it, or not.

[edspool]

Good advice; basics first. I will start the treatment and post results.

Thanks

[PoolDoc]

ok.