MH can be cheap if it is all diy. ballast for 175 mh from a lighting supply place cost roughly $40.bulbs well $40 to $100
i have a 125g with 3-175 watt XM"S 2 96watt pc ,custom built hood with 3 -3inch pc fans .with my ac set at 75 my tank stays at 79 or less.i've had my tank for about 7 years 5...