Hi Bob,
I have kept SPS, anemone, clams and ricordias under VHO lights. Only thing with VHOs, you have to change them every 6 months.
andrejka is keeping ricordias, anemone and SPS under same lihgts as yours, so I don't think it's the lights unless it is more than 6 months old.
Having said that, upgrade to 175 MH will be better.
Just my 2 cents.
HTH
David