t5 or MH?

I'm all confused over what to buy now. If I'm dropping over $500 on a lighting fixture I want to do this right.

The dude I was talking to at the store has 2 120 gallons each with MH. Also a 265. Never has a heat issue. I trust the guy as I talk to him regularly. No chiller on any tank.

Now, if I do a 8x54 Tek fixture, will I be able to keep clams on the sandbed, on a 75G?

-edit - Didn't mean to hijack, just riding along on the heating issues on MH vs. T5.

 

this is good. I'm really considering the MH lighting...again, sorry to jack this thread.

would a chiller be necessary on a 29G? I hope not..

 

zach, does this answer your question...


ermano, it depends...If the room is climate controlled and you can put a fan blowing across the water surface you may be ok with MH's on a 29 gallon

 

Is that your tank? It looks awesome! What bulb combination do you use?

 

this question was actually for me so thanks everybody, and especially sterling my cousin lol
and now i ask is a ro/di unit needed for a 90 gallon, i use tapwater?

 

I would highly recommend against tap water, I learned the hard way. Air water and ice has good selections of ro-di units, same with ebay if you're careful.

 

yeah that is my tank thanks i am using 4x UVL super actinics and 4xUVL actinics whites (50/50's)