I have some wood pieces that I have mounted in styrofoam blocks which sit underneath my substrate, but I am worried that when I fill my tank these blocks will float.
I had some aquarium safe sealant in the garage but is has expired and I am planning to plant and fill my tank the day after tomorrow. Any ideas what I can use to secure the styrofoam to the base of the tank to stop it floating that will be aquarium safe (or cured) in max 24 hrs ?
Styrofoam is going to be one constant problem. Little pieces can break off and float. The whole piece will want to float, and can break free from almost anything you can use to glue it.
If this were my tank, I'd replace all the Styrofoam with rocks, possible something like red slate, which is thin and can be glued or otherwise mounted to the wood. It will stay down on it's own and you can easily pull it up if you need to.
Styrofoam is going to be one constant problem. Little pieces can break off and float. The whole peice will want to float, and can break free from almost anything you can ise to glue it.
If this were my tank, I'd replace all the Styrofoam with rocks, possible something like read slate, which is thin and can be glued or otherwise mounted to the wood. It will stay down on it's own and you can easily pull it up if you need to.
THis is likely what you're going to encounter. But for future reference plain old super glue is completely safe to use in an aquarium and dries pretty quick.
In addition to all the Styrofoam problems I mentioned in my prior post, over time suction cups are going to get hard and quit working. I have yet to see any suction cups last for years, no matter what they were made of.
Back in my reef tank days, I would use super glue all the time. Especially when attaching corals where I wanted them. Perfectly safe. Just make sure it's regular ol super glue... the gel stuff stays put better and is easier in my opinion.
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