So I'm trying to set up a cheap refugium. I am planning on having 2 syphons so that I don't have to buy a pump. So from tank to refugium and then refugium to wet/dry filter. The only think is that the 10gal tank has one of those reptile thermometer stickers, which is on the inside of the tank (I originally thought it was on the outside). The corner of one end is beginning to peel. I filled the tank with water and waited a couple of days to see if there was any copper, which there wasn't. So do you guys think it will be ok to hook it up to my octo tank?