I have been battling cream coloured flakes in my hot tub for a long time and cannot solve the problem. I don't understand why my filter won't catch them and remove from the water column. If I'm slack on chemistry or bang on it doesn't seem to matter. I've drained and refilled. I used pipe cleaning products, I've cleaned and replaced the filter. No major change. Is it possible the water isn't actually flowing through my filter and bypassing it somehow? Through my main access panel I see 4 gate valves, all open. 2 pump system. I can put a piece of sheet floss over the overflow and it will collect the floaties, that is as good as I've figured. The purchase store is out of business and the replacement store can't figure it out. I am desperate! Any help or suggestions would be greatly appreciated. The tub is a NorthWinds by Coast Spas, model Z ENZ 50.