I set up a mason jar at an angle again in the 55 to trap some crabs, and to weight the bait I just crimped a bud light bottlecap over the food and dropped it in the bottom.
Well, I must not have had it at a steep enough angle, because the crabs took the food AND the bottle cap. Now the cap is gone. They have it somewhere in the tank and I can't find it.
I think bottlecaps are made of soft steel, not aluminum, but I'm wondering if the SW
will erode the plating or whatever and dissolve unwanted metals into the tank over time. Probably too small of an item to worry about?