RowaPhos Breaking down???

[BaliReefBox]

Hi All
I have been running rowa phos for the last 11 months changing it out every 3-4 weeks. Just now the sump has a brown /orange film all over it and I am pretty sure it is the rowaphos breaking down and causing the film. On my biopellet reactor the clear silicone tubing is even stained. I have just put some floss in a drink bottle and the outlet from the gfo reactor feed into it. after a hour the staining is htere. The gfo is just tumbling gently in the reactor and it has never been an issue in the past. Any thoughts

 

[BaliReefBox]

well I pulled the gfo reactor and it is definitely the gfo breaking down and depositing the residue. the sicce reacot pump had orange film on it like the WA outback..I cleaned it and now run the outlet through fine filter floss to try and catch the sediment. just confused as to why its happening now