I only used LEDs and have been for the past 3 years. My sps grows at a crazy rate where Im having to break small colonies off to sell every couple months. Zoas are out of control and stared growing on the side glass. Ive had to use aptisa x to kill/keep them off of my sps. More recently I have started helping a local coral farmer by setting up his system like mine and selling small colonies to him as they start shading lower parts of the tank. My tank is a 90 gallon and I am using 42 mixed whites (none of the 10k whites), 42 mixed blues, 6 reds, 8 cyans, 8 mixed uvs, 6 greens. On a side note to this my parameters are not the normal range that most people shoot for.
Nitrate/nitrite/ammonia all 0
Phosphates run about .25-.5 I keep it here for faster growth. When I ran 0 growth slowed a lot.
Mag keep around 1400-1500
Alk around 10dkh
Cal I try to keep around 500
I also dose once a week 2 cap fulls of strontium, iodine, and daily dose a cap full of marine snow.
Fish in the tank are 1 foxface, 2 bangis, 2 pajama, 3 chromis. I feed all the types of salt water cubes they make, like 8 different ones. Buy them when I get low. Take and open them up mix in a blender add 100 drops of garlic to make them love the food more, also add in one small bottle of reef chili to feed corals an pods. Feed once a day about what would be a cube. Then daily put a clip of algae in the tank for the fox-face to snack on.
Back to the main issue. We have about half the tanks at the coral farm growing with LEDs and other half growing with MHs. All tanks are plumed into two systems in case one crashes. But again half and half of each system is MH and LEDs. Leds seem grow just a little faster. That being said MHs do have better looking color to the eye. Also, for electrical cost alone we are switching to 100% leds. It is the better bang for the buck. The lights seem to pay for themselves after 1 year, with bulb replacements, electricity, cooling.
Sent from inside the shark tank!