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Discussion Starter #1
Hi Friends !

I hope all is well !

A few months back, I left my 4 feet acrylic (molded) tank unattended for a month or 2, and because of that the tank has developed unsightly layers of salt and mineral deposits on the front side (because of gradual evaporation)

No when I fill up the tank, the layers are really ugly and are at different levels.

Kindly guide me on how to remove these - I cant use anything that my scratch the acrylic...

Please guide and help me...
Thanks and Regards
Kush
 

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(I'm going to assume that it was a fresh-water tank considering the forum) The best way to remove hardwater buidup is with vinegar. Let it soak for a while, empty it out, and wipe off the stains with a paper towel. Keep in mind that acrylic is somewhat porous and sometimes algae has grown inside the pores and will not come out. I can't help you there.
 

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Agree with Dryn. Vinegar is the best method to clean it. After cleaning it, rinse it a couple of times with dechlorinated water.

Please stay away from regular household cleaners.
 

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Depending on how tough the stains are an old credit card makes a good scraper for acrylic. If your water isn't too hard to start with the stains will probably scrape off and you won't have to drain your tank.
 

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If there are any scratches after removing the buildup with vinegar, there is a product called novus that removes scratches and any damage that is left over. I've used it to remove scratches from a tank that was given to me.

Karebear
 

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Discussion Starter #6
Hi Friends,

Thank you so much for the kind replies and for caring. My tank has just cycled and is all setup beautifully... I really dont want to tear it down and so I cant use the vinegar trick... The Buildup is on the inside making the upper few inches look a little cloudy / opaque...

Kindly help me friends....
Thanks a lot for caring...
Kush
 

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Discussion Starter #7
If there are any scratches after removing the buildup with vinegar, there is a product called novus that removes scratches and any damage that is left over. I've used it to remove scratches from a tank that was given to me.

Karebear
Hi there !

Thanks a lot for the kind reply - Can I use this product 'novus' on the inside while the fish are still in there ? My tank has a lot of scratches and I would be so thankful & grateful to you if you can kindly help and guide me removing them... Please advice regarding this - I'll be truly grateful to you forever... (sorry for sounding very desperate...)
 

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Discussion Starter #8
Depending on how tough the stains are an old credit card makes a good scraper for acrylic. If your water isn't too hard to start with the stains will probably scrape off and you won't have to drain your tank.
Hi there !

I'll try this now. Can I just scrape the front surface with the water in it or should I drain a few inches and expose the buildup before scraping ? Are there any risks of scratching the acrylic ? Also my water is on the harder side as I always use salt in my aquariums...

Kindly guide me...
Kush
 

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Discussion Starter #9
A few people suggested me to drain about 25% of water so that the stained area is exposed. And then to use a cloth dipped in vinegar or diluted HCL over the build-up area... Is this a good idea ? I mean is it safe for the fishes ? and is it safe for acrylic ?

Kindly guide me friends...
 

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Hi nagukush. Your problem is that you want to correct the tank and you have fishes in it. There is no way you can do that without endangering the fishes ................... impossible is not a word that I use easily but this is one instance where I have to.

You say your tank is cycled, if that is so your filter will remain cycled if you transfer your fishes to a temporary home and use your filter for it. That will enable you to completely re-vamp your acrylic tank using the methods already advised (except don't use HCl without precautions to yourself). The only other way is to live with the ugliness or endanger your fishes. There are no magic wands available.
 

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If your water is somewhat acidic it may dissolve the minerals over time, but if the minerals came from the water in the first place it will take QUITE a while!
 

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Do you have hard water in your fish tank? If you do, the vinegar from the the rag will not endanger the fish and plants. Pure white vinegar is not poisonous, it's just acidic. The acid from the vinegar wont have much of an affect on pH of hard water because it's so well buffered and a few drops of vinegar will dilute quickly. The 10-20 gallons you'll add refilling the tank will additionally dilute the vinegar. You don't need a sopping wet sponge, just a wet sponge.

Do not use razor, steel wool, brillo pad (same thing), or a scouring sponge. Use a rag or soft sponge.

If the water is soft or acidic. Your best bet is to keep the tank filled so the stains are underwater and come back in a couple weeks wipe off whats left with a sponge.
 

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I've worked at the LFS for eight years now and we have always removed the fish before using novus. It is a solvent but it evaporates quickly. There are three formulas for deep scratches, light scratches and polishing. I went to the local hardware store for clothe buffers to put on my drill motor. It just takes too much effort to do it by hand. When done you just rinse with water and fill. If you are willing to put in the effort you can get all but the deepest scratches out.
 

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Bionic Aquarium stains!!!! Help!

Hey all,

I recently got an emply glass tank from a friend that I assumed had lots of your typical hard water stains on it. So naturally, i used vinegar. When that didn't even touch the problem, I tried fine steel wool, then a lemon cut in half, a credit card - basically I have tried all the usual tricks. Then I went against all my DIY instincts and bought a product called rydyt 2 which also didn't work. What the heck is this bionic, unremovable stuff on the inside of my tank? It definately doesn't look like it is scratched. Is it possible that the glass is somehow stained?
 

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I have the same problem as you with some glasstops I got with a tank. nothing seems to work on them. I'm half-tempted to get out the CLR and deal with it and just soak the sucker in bleach for a week afterwards lol
 

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I'm tempted by the CLR too!!! Does anyone know if using CLR (and rinsing it like crazy!) would ruin this tank or make in uninhabitable for fishes? Until I get a definative answer on the CLR method, I'm going to buy a couple of gallons of white vinegar and leave it to soak in the basement for a week and see it that helps. sigh.
 

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using vinegar sometimes takes multiple treatments and a little patience. Give it some time to soak in before rinsing.
 
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