Well i just started cycling a tank, and I added too much gravle, so once it is cycled, I will remove some and store ti for later, BUT i dont know how to store it. How do you stor eit without lettign it dry out?
I could be wrong, but even if the gravel stays wet, I think the bacteria would still die. I think that the flow of water, oxygenation, and heat all play a role in keeping the beneficial bacterial alive.
I use a colander with holes too small for the gravel to fall through. I make sure the gravel is no more than 2-3 inches deep and then I set the colander in the sink. Within about a day or two it is dry. But I also have my own fish room to do stuff like this in. I've also taken to storing gravel in my old betta bowls. It's a good deterrent for getting more of 'em. ;-)
I clean off my kitchen table, layer out some clean paper towels, boil the gravel, drain it and spread it out over a large area, preferably as thin of a layer as you can get it. Hot rock tends to dry faster. Leave it set for a couple of days and store it in plastic containers. I rip bags to easy and plastic containers are easier to store in my case (ziploc). I boil because it helps with the fishy smell and sanitary reasons.