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Slime in my R/O Water

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H20doctor

MMMM Tasty Children
Joined
Jul 4, 2003
Messages
55
I thought I would throw this one out there because I know it happens to those who make up RO water.
Question : I make up 30 gallons of RO water in a rubbermaid garbage can. Sometimes I leave it just fresh water, and other times I mix it up with salt. After about a week or two there is this slime that developes on the walls and the inside. Is this slime bad or good? Do I add this water to my reef or throw it out?
 

tdksound2005

Active member
Joined
Dec 20, 2004
Messages
27
this is normal due to the plastic bin you r using .just make sure the temp and sality of the water is right before putting in the display tank
 

H20doctor

MMMM Tasty Children
Joined
Jul 4, 2003
Messages
55
come on are you serious? isn't there some kinda nasty's in it?
The water is unheated and the can is a rubbermaid 30 gallon.
 

colleen

Mazeracer
Joined
Nov 13, 2004
Messages
83
Location
Richland
How long since you changed your RO filter cartridges? We were having that same problem, using filter cartridges that were around 15 months old. We got new cartridges and don't have algae in makeup water anymore. (The water takes quite a bit longer to filter now too). We have a couple brute garbage cans that have had water in them for several weeks now, still no signs of algae.
 

H20doctor

MMMM Tasty Children
Joined
Jul 4, 2003
Messages
55
I have a 5 stage Ro unit, and the membranes are all good, I change them out once a year, I still think we should have a scientist look at this under a microscope. This really is not a big deal I just threw this up on the board to see what people thought of the slime in the RO water
 

NaH2O

Well-known member
Joined
Jan 25, 2004
Messages
8,568
Moved this thread to the chemistry forum, to see what our resident chemists think.

Do you have a pump in with the water to keep it circulating?
 

cwcross

Well-known member
Joined
Aug 18, 2004
Messages
250
I don't think it is anything to worry about. When I have left water in my salt mix can (rubbermaid) I get a slight algea buildup on the walls too. I jut put it in my tank with no problems. Different algeas will grow in different conditions. Nearly any water exposed to air and time will grow algeas and plankton in it. The more nutrients the faster it will grow. Light conditions and other enviromental factors will contribute to the specific sort of algea that will grow. One that grows well in a trashcan with no light may not grow at all in one with a light cycle etc.

Just my opinion but backed by some experience...Sincerely...Collin
 
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