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Do razor blades scratch tank walls?
<< Also, is there some kind of "safe" holder for these razor blades? I am
feeling that it's a bit dangerous, especially in tight corners behind
plants, where I can't see what I'm doing. I do need to clean those corners,
because that side of the tank is visible from another side. >>
They don't with my tank now, and did not scratch the glass on my tanks back
in the 1950s. I guess you should replace the blade when it gets a bit rusty.
Regarding a safety holder, *ALLWAY* makes one. (I have one) I know not about
local availability but I found mine at The Aquarium Center, Randellstown MD.
And I agree with the implication -- some of the old ways, are better than the