My exhaust is vented up thru the roof via an old flue pipe!!! Im thinking of cutting a hole in the room for a filter and vent to supply fresh air in. Also even a larger exhaust fan. So I should get a definatley get a small humidifier, or is there some cost effective way to do it? My light is just mounted on an adjustable cable used for office florusent lights and it is kept high so the plants dont see too much heat. I'll try to get some pics on here sooner or later. Im looking on spending around 120 for a decent ph + tds tester, if anyone knows of one please let me know. I dont know too much about them but from what I have found from surfing around hanna is a good brand. But I'm open for suggestions. Thanks for all the input.