Brown dust on Bottom?

[Peter Vogelsberg]

Hi,

I have this brown dust (it disintegrates when I brush it or just come close to it with a brush) that accumulates at the bottom of my pool only while the pump is running. If I vacumm at night, then shut the pool off, I will wake up the next morning and it's ok (no dust accumulation). However if I vacuum in the morning and run the filter all day, when I come home from work, it's all over the bottom again. Been going on since I opened the pool in May.

Here are my latest readings using the TF-100 kit.

FC 3.0
TC 3.0
TA 60
CYA 45
pH 7.7

Could this be algae? My water is always crystal clear. It accumulates in any crevices and seams along the bottom only when the pump is running. I wonder if I need to change over the DE in my filter? Can't get rid of the stuff, whatever it is. In this picture you can see it at the edge of the walls and the bottom and it's scattered around the bottom. The dark spot in the upper right side of the picture is just the reflection of a tree.

[attachment=0:wc56ja41]IMG_6588 (1283 x 855).jpg[/attachment:wc56ja41]

I have the same issue , did you ever figure out the issue and how to resolve? This has been driving us crazy fir a year and half and a lot of money.

 

[needsajet]

Welcome to TFP. Good to have you here

99% of the time, brown dust on the bottom of the pool is dead and nearly dead algae. Note that algae does not mean green. By the time a pool turns green from algae, it's utterly infested with algae living in multi-cell colonies. Beginning of algae is not visible to the naked eye.

Start here, by reading all nine links:
Pool Care Basics

If you decide to adopt trouble free pool care, order a test kit and you can get started toward a reliably clean and safe swimming pool.

 

[Cindo]

I have the same issue , did you ever figure out the issue and how to resolve? This has been driving us crazy fir a year and half and a lot of money.

Same issue here for years. Someone has to have a solution!

 

[Newdude]

Someone has to have a solution!

We DO have a solution. It's called TFP clear.

How Clear is TFP Clear?


Read the links in post #2 to see how. And Welcome !!!! (You too @Peter Vogelsberg)