Black Residue in Pool Bottom

[dklean1]

DTE was replaced last week; removed element, hosed off old DTE, and installed filter prior to adding new DTE. I am experiencing black residue in the center of the pool after the pump finishes the normal cycle. The resudue, black "dirt" is removable with the vacuum, but it returns after each pump cycle and I am at a loss. Perhaps someone can offer some guidance. Thank you.

 

[JamesW]

Pictures?

 

[dklean1]

Chlorine pool, FC & TC are high @ 5-10, pH 7.6, total AL 90. There are a lot of small black dots on the bottom which can brushed away with a wire brush and a lot of elbow grease. Is there an easier way to remove those black spots? Thanks.

 

[JamesW]

Pictures?

What is DTE?

Pictures of system?

 

[Lilypad]

Guessing DTE = DiaTomaceous Earth?

@dklean1 We refer to it as DE.

Welcome!

 

[JamesW]

Probably DTE Energy.

DTE Energy Home | DTE Energy

DTE Energy is a Detroit-based diversified energy company involved in the development and management of energy-related businesses and services nationwide.

www.dteenergy.com

Maybe Down To Earth.

Data terminal equipment.

Distance to empty.

Dithioerythritol. C₄H₁₀O₂S₂

Days to Expiration.

DTE (direct to edit), a digital video recording method.

Dora the Explorer.

Dual-Tile encoding.

Directorate of Technical Education.

Department of Technical Education.

We can guess all day, but the person needs to be specific.

 

[Newdude]

Pics will say 1000 words.