Well, to answer your question wwfstyle, I was just wondering what would happen.......plus with a biger tank , everything costs more, the tank, sand , lr, lights, salt,.........I think that this tank , the 10g, has been no prob. for me, I know that I really dont have much leaway as to how much water evaps. before my chemistry starts getting crazy, I add water to it every night before bed............the ro water that is use is right under my tank, so its no prob. to just get a cup full an top off the tank. On top of that if I got a mh bulb setup, I would not buy it as a pre setup kit, I would get all the parts I need and assemble it myself, but even to add a mh bulb will cost me enough, due to the fact that I would have to buy some fans for it, reflector,bulb,ballast,........all the components........The main reason I switched to a 10g from a 30g was the cost of everything.......The lr alone would cost me about $270 it is $6
a lb here where I live, an thats only 45lbs. So now do you see why I down sized??lol I am only 17 I dont make alot of money, so a downsize helps in more ways then 1.