First year pool owner. battling some sort of white powder at the bottom. got pics

[dph764]

So i turned on the skimmer and drainage hose and this is what came out. What is it? From browsing this forum it looks like calcium probably from calcium hypochlorite shocking. My filter after a year looks like a hot mess and is really heavy! . the powdercolor is of the whitest of paint and when it dries on my fingers its a very fine powder.

 

[ajw22]

Welcome to TFP.

Pour some muriatic acid on the white powder. If it bubbles it is calcium.

What model filter do you have?

Post pics of your equipment pad.

How is the pool chlorinated?

You know what chemicals have been used in the pool?

 

[rjd1965]

Wondering if this riddle was ever solved. I am combatting a similar white powder.

 

[tradewinds]

I have another thread on this but still no threads explains how to solve and then remove the build up.