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07/20/2020, 08:19 AM | #1 |
Registered Member
Join Date: Apr 2020
Posts: 38
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Phosphates I am lost?
I tested my tank with Hanna ULR Friday and my reading was 0.06
I added 1tbsp of Rowaphos to my reactor and now todays reading is 0.14? How is this possible? My phosphates went up instead of down. |
07/20/2020, 11:06 AM | #2 |
Crab Free Zone
Join Date: Sep 2017
Location: Ontario, Canada
Posts: 2,906
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Testing error?
I gave up on phosphate, I tried every test and an ICP. For the last three years, if it’s under .2 on any test, that’s ok by me. I have a ton of corals in a mixed 65g, and never had any negative result. |
07/20/2020, 02:36 PM | #3 |
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Join Date: Nov 2009
Location: Reseda, Ca.
Posts: 1,717
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1 tbl isn't much unless it's a very small tank
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Please don't feed the bears because the bears will become dependent on free handouts and forget how to take care of themselves …... Current Tank Info: 75 Gal. Mixed reef mostly sps |
07/20/2020, 05:46 PM | #4 |
RC Mod
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 88,616
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I agree that 1 tablespoon of GFO is a very small amount. How many gallons of actual water are in the system?
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Jonathan Bertoni |
07/24/2020, 10:19 AM | #5 |
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Join Date: Jul 2010
Location: Austin, TX
Posts: 1,985
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In addition to the above comments, how soon after feeding were the 2 tests done? What other maintenance was done? Besides corals and algae messing with phosphates, sponges and biofilms are messing with phospahtes also (along with carbon and nitrogen). Depending on variables and sensitivity, tests a few hours apart "can" give surprisingly different results. And IMO, 2 tests with just one test kit really isn't enough to go on. Here's a good article by a renowned scientist discussing this Skeptical Reef Keeping #9
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"Our crystal clear aquaria come nowhere close to the nutrient loads that swirl around natural reefs" Charles Delbeek |
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