1. Oct 30, 2013 #1
   West Des Moines, IA

   beckerj3 Expert Reefkeeper Board of Directors Leadership Team GIRS Member

   4,805

   West Des Moines, IA

   Ratings:

   +615 / 2 / -0

   
   I just changed my GFO. I use it in a TLF reactor. It had only been 2 months since my last change. This time (first time for this), the GFO had changed to the color of cement - and was wanting to lump together. Anyone had this before and can tell me what happened????? Over the last year my alk has been raised. Use to be I had a hard time keeping it above 8.5. Recently it was running 9.5 to 10.0 Could that have had any impact??
   
   
   
   

    
2. Oct 30, 2013 #2
   

   Lee Experienced Reefkeeper

   1,292

   Ratings:

   +0 / 0 / -0

   2 months! I've always used a smaller quantity and change about every 2 weeks.

    
3. Oct 30, 2013 #3
   Des Moines, IA

   ninjazx777 Experienced Reefkeeper

   2,353

   Des Moines, IA

   Ratings:

   +7 / 1 / -0

   If its not tumbling pretty good it will harden up like that

    

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