MH 10k or 20k

Originally Posted by monsterz1975

Which MH is good for a reef tank 10K or 20K?Coral look nice under 20K MH.

20K is too blue for me, but it's a personal preference. Going from 10K to 20K MH, u are going to loose alot of lumen (intensity). To compensate the intensity, u need to go to higher wattage 20K MH (also, 20K bulbs are more expensive than 10K) ....a big cost upgrade. A cheaper option is to run more actinic tubes to compliment your 10K if u desire a more bluish look.

Originally Posted by Jeffrey74

if the mh set you getting comes in 1 10k & 1 20k its ok imo. no need waste money change them now.

Have not buy it .