I have a 55g plastic drum where I will make up 50g of saltwater to use for water changes. After 6mos of making saltwater coming and going thru this plastic storage drum, the side and bottom of the drum has caked-up a light-brown substance.
This storage drum has about 20-40gals of premix saltwater at any given time. the drum has a lid, the saltwater is not heated. the only thing in there is a water pump to keep the premix saltwater randomly moving around. saltwater exits by gravity thru the bulkhead seen in picture.
Any IDEA what this stuff is?
Here a picture INSIDE THE DRUM after scrubbing the sides and the bottom. The bottom is only like 2inches deep right now, with the sludge settled on the bottom maybe a 1/4inch thick:
This storage drum has about 20-40gals of premix saltwater at any given time. the drum has a lid, the saltwater is not heated. the only thing in there is a water pump to keep the premix saltwater randomly moving around. saltwater exits by gravity thru the bulkhead seen in picture.
Any IDEA what this stuff is?
Here a picture INSIDE THE DRUM after scrubbing the sides and the bottom. The bottom is only like 2inches deep right now, with the sludge settled on the bottom maybe a 1/4inch thick:
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