New Light for SW aquarium

[steve223]

I have had 2 FW aquarium fo 15 years. Last month decided to go SW. 55 gal with LR abd two small gobys, it is still in cycling phase (week 5). I decided to buy a combo light with MH and Flor by "cloralife". My question is water tempature. It seems like the MH are going to really heat the warter up. Question 2: how long should I run the MH? Thanks :help:

 

[nm reef]

To reduce the heat use a fan across the water surface(most of that type unit have built in fans to exhaust the heat) plus you can remove the glass tops which will allow for more evaporation which will in turn reduce heat issues. As for how long to run them....most hobbyists try to maintain a typical 12 hr on 12 hr off schedule. I run my MH's for 8 hrs with my actinic VHO's on 1.5 hrs before and 1.5 hours after.......

 

[steve223]

Thanks