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View Poll Results: What is your PO4 testing routine, and what do you do to control PO4?
I run GFO. 26 46.43%
I run a ULNS system. (Eg. Zeovit, Ultralith, Vodka or other carbon dosing) 13 23.21%
I use macroalgae (chaeto, caulerpa, etc.) 31 55.36%
I don't do anything. Water changes good enough for me! 8 14.29%
I test PO4 regularly. 8 14.29%
I test PO4 infrequently. 15 26.79%
I have noticed nonzero PO4 in the past. 3 5.36%
I have never had a PO4 reading. 8 14.29%
Multiple Choice Poll. Voters: 56. You may not vote on this poll

 
 
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  #24  
Old 11-06-2009, 12:56 AM
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Lance Lance is offline
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My 90g has been running for 2 years and has a pretty large bio-load. I have never had noticeable PO4 or NO3 readings on either Salifert or Elos kits. SPS grows quite well in this tank and very seldom do I have issue with algae growth.
In the 225g tank however, SPS doesn't do crap. A few pieces do ok and others not so good. I am always having algae issues as well. P04 readings in this tank are undetectable and N03 are about 10 to 15.
Both tanks get 10% water changes bi-weekly, both have refugiums with DSB and large amounts of macro-algae. I have tried Tailored Aquatics Nitrate and Phosphate Destroyer; vodka dosing; and larger water changes on the 225g: with no positive results. SPS continue to struggle and algae growth has not been reduced.
The only difference I can see between the 2 tanks is the rock I used when setting up. The 90g was all live rock, while in the 225g I used a lot of BRS Eco-Rock. Perhaps there is a lot of phosphates bound up in this rock and continues to leach out.
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