GMYukonon24s, the problem with a light close to the water surface, with such a high tank, is that the light intensity near the top is many times what it is near the substrate. If you have low light at the substrate, you will have far too much light at the surface. You can try 5 inches above the tank, and it might work out alright. My gut feeling is that nearer to 12 inches would be better, but then you might not have enough light at the substrate.
The MH pendant lights would put out enough intensity that you could raise them over a foot and still have adequate light near the substrate. The watts per gallon is meaningless for this tank. Given that you will have high light in the upper parts of the tank, in any case, I think CO2 is essential however you light it. Otherwise you are very likely to have BBA which would be very hard to eliminate.
hey you posted on my 110 about putting the T5s a few inches above the tank
would 5 inches be good enough?
and am I right with the MH would give me 2.72 which requires co2
Ive been reading over 2 wpg you need co2 that's correct?
Hey Hoppy, I was reading a thread about testing rocks with vinegar a while back and I believe it was you that suggested it. What was the percentage of acid? I have tried to find that thread again and cannot. Also are there other ways to test rocks. Any help you can give would be a huge help.