John,
I ran the same setup on my 90 for about a year. You may want to check you Phosphate Levels with a Salifert kit. What type of Caulerpa are you using and how long has the tank been established? Some forms of Caulerpa can cause problems. Are you using RO/DI top off water? Have you checked Calcuim or Alk yet. I put off getting these test kits for a long time and felt stupid for not getting them sooner as they can tell you when to do water changes. I know Leng says you don;t need to do water changes, but you should anyway. I went 9 months without one but lost some corals along the way. Also for some reason, I never had any luck with Clams. I now have a 220 and am using a Skimmer and will be turning on the plumbed Eco-Sump this weekend. I will not use Caulerpa again. Try to get Sargassum sp. and Chaetomorpha sp. as they do not go sexual and release toxins into the water.
I ran the same setup on my 90 for about a year. You may want to check you Phosphate Levels with a Salifert kit. What type of Caulerpa are you using and how long has the tank been established? Some forms of Caulerpa can cause problems. Are you using RO/DI top off water? Have you checked Calcuim or Alk yet. I put off getting these test kits for a long time and felt stupid for not getting them sooner as they can tell you when to do water changes. I know Leng says you don;t need to do water changes, but you should anyway. I went 9 months without one but lost some corals along the way. Also for some reason, I never had any luck with Clams. I now have a 220 and am using a Skimmer and will be turning on the plumbed Eco-Sump this weekend. I will not use Caulerpa again. Try to get Sargassum sp. and Chaetomorpha sp. as they do not go sexual and release toxins into the water.