Denitrator, Where’s The Flow Gone? Update

I run a sulphur based [tag-tec]denitrator[/tag-tec] on my reef. It has been running continuously for years without problem, though it has needed some adjustment of flow from time to time. That is to be expected. However, a while ago the flow went wrong, it slowed down considerably. There isn’t a lot of flow anyway on a denitrator, so the flow became almost non existent. [Read more]