Green Pool (Was black at first)

[PoolDoc]

Looked at your pool form. You have an S200 filter which has 'rated' flow of 44 GPM, but an optimal flow of 33 GPM (2.2 sft x 15 GPM/sft):



with a 2 HP Pentair Super-flo, which is functionally a 70 - 90 GPM pump in your situation!



Unfortunately, that is a massively imbalanced pairing. The pump is way, way too big for the filter. As a result:

+ You are probably missing sand, that has been 'blown out' during backwashing.
+ You are probably pushing algae THROUGH the filter, rather than capturing it.
+ You are wasting at least 1/2 of your pool electric bill -- making your filtration worse in the process.


Here's what you need to do, immediately:

1. Install a ball valve between your pump and filter. Throttle the flow, till your *clean* filter pressure is 18 psi or lower.

Hayward 2" ball valve

2. Once the ball valve is in place, open the filter top, and check your sand level. You'll need this dome wrench, if you don't already have it:

Hayward S200 dome wrench

3. If the sand is low, add labeled filter sand to the correct level.

Longer term, you'll need to downsize your impeller / diffuser to 3/4 HP. Your 2HP motor will be a bit less efficient running the 3/4HP impeller, but it will run VERY cool, and last forever AND you'll probably still cut your bill in half.

3/4 HP impeller (1/2 & 3/4 HP impellers are the same)
3/4 HP diffuser
Seal kit

Amazon is not selling the seal kit directly, so here's another source:

Seal kit