mushrooms not doing well

I know they are like weeds for most, but I can't seem to get mushrooms to last in my tank.
My nitrates are 0 nitrites 0
My clams thrive my frogspawn and hammers do well.
But the Shrooms seem to die off and never multiply.
Does anyone have any idea?
Too much light? too much flow?
 
Too much light, mushrooms shrink and look ugly under MH's, if you have a dark corner, throw them in there and see if they look better in a few weeks.
 
Art, I have not put in any iodine in over 4 weeks now and just did a water change

ReefGod
I will try and stick some in a corner and see what happens, but for the most part most people I see have tons of shrooms under the same conditions

Thanks
 
Double check your salinity and PH, they may be off. If you use a hydrometer then get a lfs to check your salinity and calibrate your hydrometer against their refractometer. :D

Cheers,
 
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