Im changing the water in my one gallon tank tonight, and I plan on replacing the white gravel with clear blue marbles that I've had for a while. I have the marbles soaking in a cup of 1/2 isopropyl alc. and 1/2 hot water. Is this okay? I will rinse thoroughly.
Also, Is there a downside to using marbles as opposed to gravel? My live sword plant should be fine as the packaging said it can be used with marbles.
The main reason why I'm using marbles is that my tank is LED lit from the bottom, and it would look nicer with clear glass instead of gravel.