bit of a weird one

[stocky]

While changing the water today I noticed there was a brown slime on the water pipe and a fine sand consistency powder on the bottom of the reservoir.
The part that makes it a bit weird is that the slime doesn't appear to be on the roots and the smell is earthy and nice.

Info about the setup!
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* NFT hydro setup
* temps and humidity are fairly stable
* The reservoir used to be an oil container but I did wash it out Very well before use.
* The reservoir is clouded plastic, opaque, however the roots are covered and in darkness.
* start of 3rd week.
* using canna aqua A + B
* PH 5.8-5.9

Anyone have any idea what the slime could be? could it be the nutrient tank being exposed to light (not bright light as the plant tray is covering the top of the reservoir), has anyone got an idea on how to lightproof it?

Thanks
Stocky

 

[superstoner1]

It is normal to get a biological buildup on rubber or hoses. I would worry about that res letting light in, opaque is not light proof. Paint it black then white

 

[stocky]

It is normal to get a biological buildup on rubber or hoses. I would worry about that res letting light in, opaque is not light proof. Paint it black then white

Ahh thanks, no need to worry after all .

Any idea on the powder at the bottom, im thinking limescale?

yh I was planning on getting some ducktape and wrapping it up so its light tight.
Thanks
Stocky

 

[superstoner1]

Could be nute fall out, salts, or dust from any media you might he using.

 

[stocky]

Could be nute fall out, salts, or dust from any media you might he using.

Salts are most likely as i have terrible water here, thanks, for all your help am getting some gaffa tape to lightproof the reservoir.
Thanks
Stocky