How about using some diluted muriatic acid? I always use it to clean up PH's, pumps . . anything covered with coralline. This summer I took my acrylic sump out which was covered in coralline. I used the muriatic on it and it cleaned up fast and easy. I just find vinegar takes way too long for me. Vinegar is a much milder acid compared to muriatic acid.
A person just has to be careful when working with such strong chemicals(ie.. gloves, goggles, and access to fresh water) and make sure to do it in a well ventilated area, preferably outside. But it will make short work of the job of cleaning the tank. It will soften the algae within minutes and then just take a hose and careful rinse it out.
Muriatic acid is used for swimming pools, etching concrete and a host of other uses. A gallon costs about $12 or so.
A razor blade on an acrylic tank is probably not a very good idea and you would run the risk of scratching up the plastic very easily.
Bill
Last edited by chwkreefer; 09-20-2006 at 09:29 PM.
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