So since day one I been using the BRS GFO and carbon dual reactor. I been ordering the 1lb container because I have read some people run find with no GFO so I was testing it out. Now I kept buying the 1lb container and it would last me about 3 months before I need to order more. Was getting sick of ordering it so quickly (didn't think of ordering larger container cause I was debating of going bio pallets). That on my last order I decided to let it run out. I ran old GFO an extra two weeks with no ill affect to my tank. I knew I needed to clean the reactor (container was hard to see inside) so I decided to soak the inside container with a vinegar/water mixture; which cleaned it well. Why that was soaking I left the GFO outside container empty but still ran the carbon in the second container. I just took a look at my tank last night and it looks like my red digi might be getting affected by this change. Now I did plan on keeping on top of testing but life got in the way so I did not test like I wanted to. The issue I see is I noticed that there isn't as much polyps on it as there were before. When I used to look at it the frag was full of polyps given it a nice red color. Now its still red but I can see the stream a little between the polyps. Not sure if this is just growth or an ill affect. I am working on a water change now (as I am due for one) and just ordered 1gal container of the GFO (that should last me a year).
