How do you guys deal with coraline on acrylic???

[Anonymous]

I just had a tank moving disaster, and had to squeeze as much as I could save into a 50 gallon acrylic tank. The 92 gallon that it all came out of was glass, and the coraline was running rampant on the back glass. I let it get to the point where I couldn't even scrape it off without a huge effort.
How do you guys keep it in check in an acrylic tank without scratching it up? I've stayed away from acrylic reef tanks, but now I have no choice for the moment.
Also, out of necessity this is now a sumpless and skimmerless system. Any suggestions for water movement/oxygenation - ie, powerheads or hang-on filter?
Right now it's just a powerhead. I suppose I'll have to pick up on the frequency of the water changes too.
Thanks
Jim

PS. I will be selling the CPR combo skimmer/sump (cheap) off of that 92 gallon if anyone is intersted. That tank will become a freshwater tank after it is repaired.

 

[texman]

I use a Kent Marine scraper - red plastic blade. It does a pretty good job on coraline algae and does not scratch the glass. My magnavore magnet removes green algae but leaves the coraline behind.

 

[texman]

Sorry, I should have said "scratch the acrylic"

 

[XXX]

The Kent scraper works well. The three inch scraper is easier to use than the smaller one. The "secret" is to clean the acrylic often. I clean mine every other day...whenever I see even tiny dots showing up.