the 225 is days away from being started cycling. i just have a few concerns .. it was a used tank, was originally saltwater but im converting it to freshwater. The tank was extremely dirty when i got it so i spent a few hours doing a good clean with just water .. got the glass almost absolutly perfect. probably as good as i will get it. but all the white spots that were caked on to the glass are also on the overflows .. i managed to scrape it off most of the glass with some sort of brush .. it worked. on the overflows (plastic) imk finding it harder to remove. the main piece of the overflow is quickly removable so i can take those off the overflow and clean them still however ive already added teh sand and deco stuff (driftwood etc) so the rest of the overflows will be difficult im thinking. those parts are fine but the parts i tried to clean yesterday didnt clean as well as the rest of the overflow and i dont know why. they seem to be a lighter black and everything still. what do you guys reccomend to clean these with to remove the rest of the white spots? (I dont have any bleach on hand). and last but not least .. any other concerns i should be worried about with the tank conversion?