1st time user of TF-100 kit and Pool Math

[kingadriann]

That is how you remove small rust stains.

Ok thank you very much, I will do that then. Have a great day.

 

[kingadriann]

This doesn't really answer your question (I'm not familiar with what looks to be a cartridge or DE filter), but if you're going to drain some down it's much safer to rent or buy a smaller submersible pump and use that to pump out the water. If your pump runs dry it can damage the pool pump.

What sort of pool surface do you have? Vinyl, plaster?

Sorry I completely missed your reply. Yes I have plaster pool and I have a submersible pool pump also. Thanks.