cleaning off dried coralline algae

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BMac91

Plecostomus
MFK Member
Mar 14, 2011
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Alabama
I recently picked up a 210 gallon glass tank that was previously used for saltwater. It was never cleaned and has been sitting dry for a few weeks, so the dried algae is ALL over the back glass, side glass and plastic overflow columns. All the research I did kept saying, vinegar will make it where it will wipe of practically.

I tried diluted vinegar first, thinking if it was that easy then I would be good. No bueno, so I went straight vinegar in a spray bottle and attacked it, have gotten maybe 1-2% of it off and it has taken around 1 gallon of vinegar so far and I have been scrapping with a glass scraper from the lfs and recently went to a straight razor to see if that helps. It has taken me 2hrs to get that small amount off, at this rate it'll take weeks to get it off.

Anybody tackled this before and have better luck with something else? I thought about filling the tank and mixing in some vinegar, but at 210 gallons and the fact that it has overflows, with no bulkheads, is what is stopping me. That would be a large amount of vinegar to even get a small ratio completed.

Any ideas?
 
Weird, my 180 was previously salt and in rough shape. Vinegar and alot of scrubbing was all it took for me.
 
I used a putty knife after I let vinegar soak for a couple hours
 
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Did you fill the tank with water and vinegar or just spray it on there? I keep spraying mine hoping it will continue soaking, but it keeps drying up on me in a matter of minutes.
 
Did you fill the tank with water and vinegar or just spray it on there? I keep spraying mine hoping it will continue soaking, but it keeps drying up on me in a matter of minutes.

I soaked paper towels in it, then left the paper towels on the bad areas for a few hours. Worked pretty well.
 
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Muriatic acid will take it off, used to clean tanks with it at my old store. It will do it in a fraction of time that vinegar takes. It will look brand new after. Start out diluted and increase as needed. 20:1 ratio works well. Wear gloves and have good ventilation.
 
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Awesome, I will pick up some of the acid tomorrow and give it a shot. Thanks for everyone's assistance, will let ya know how it goes.
 
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