Hi everyone, this is my first post here. So far im loving the pics and have become inspired to redo my 10 gallon. It is really low tech now, 18watt bulb, baby size hang on filter, but this is going to change. I need to know if i can lay a CO2 cylinder on its side as i do not have the space to conceal it in the cabinet beneath it? Will it flow properly? can it be regulated with needle valve and ph controller which i just purchased? Thanx in advance.