My experince with mushrooms is this. Some will thrive under one normal output flor bulb, some under two, some under vho, some under pc, and others will just love being in shadows under M.H. bulbs. In my opinon it is not the type of bulb that determines if a mushroom will grow. It is placement in relation to that bulb. I.E. two inches from a m.h. will kill them just as dead as 30 inchs from a 15 watt N.Output flor tube. If you use some common sense you will be able to keep mushrooms just fine anywhere you have a thriving shrimp. What I am saying is if you have live rock stacked halfway up the tank or better and only one tube, center it up under the light as high as you can get it. The reds in my opinion seem to do very well in low light. If you have a powercompact light anywhere in the tank will work, vhos the same. There really are no hard and fast rules in this business. When anyone ever tells me that I must do it this way or I will fail, I politely nod my head and ignore them. I have kept longterm under p.c. lighting acros, clams, and anemone. Healthy and doing well. Now I have 2x250watt M.H. and I like them better but I was told by some that it was impossible to do what I did. Iodine is completly unnescesary additive in my mind. I never add what I do not have a test kit for. Try not to let the pet store folks sell you a bunch of additives unless you know you need them by comparing natural saltwater levels of elements with your tank enviroment. They are not bad people, they just have to make money and selling stuff that costs $3 for $10 is a great way to do it. HTH Steve
