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Old 11-07-2004, 11:28 AM   #1
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phosphates

Is a phosphate reading of .1 high. Would this be enough to cause cyano and brown algae. I tested both the tank water and the makeup water and i get the same reading .1. Is there a way that i can remove the phosphates in the make up water before i add to tank.
i am using ro water.
Thanks
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Old 11-07-2004, 03:23 PM   #2
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Do u buy the water or do u own a RO unit?
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Old 11-07-2004, 03:36 PM   #3
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yes, .1ppm of phosphate could feed cyanobacteria. Brown algae is caused by diatoms, and will go away over time.
See if your source of R/O water includes a DI filter as well. DI should remove all phosphates, but if the filter's old, it'll leave traces behind.
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Old 11-07-2004, 06:47 PM   #4
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I buy it out of a machine It says ro water) and i have tried using a tap water filter.
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Old 11-07-2004, 07:15 PM   #5
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What you need is to get water that is RO/DI. Does your LFS sell it? I bought mine from mine for years but they tended to let their filters go too long. I finally broke down and bought a unit of my own. What you should do is test the water before it goes in your tank
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Alex n Mary

150 gallon, 30g fuge/sump, 4.5 watt/gal VHO Lighting, 4" sand bed, 290 lbs LR, CDX-3 Nitrate/Phosphate filter

Female Naso "Isabell" or "Izzy", Emperor Angelfish, Flame Angel, Red Sea Sailfin tang "Bambi", Maroon Clown "Nani", 5 Chromis, 1 Aglae Blenny "Bengi" , Yellow Watchman Goby, pr of Banggai Cardinals, Lyretail Anthia, Six Line Wrasse

1 cleaner shrimp, Coral Banded Shrimp, lettuce nudibranch, 1 sand sifter stars, 1 tiny red brittle star "red", 1 tiny red and white banded serpent star, 2 tiny banded serpent stars, small orange Linkia starfish, assorted hermits and snails. Corals: star polyps, A ton of different types of mushrooms, yellow zooanthids, brown-orangish and light blue paly's, orange ricordia.

90g RR, W/D, 120 lb's LR SF eel, pygmy angel, pr sebae clownfish, 4 chromis. Star Polyps & Mushrooms
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Old 11-08-2004, 10:32 AM   #6
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rbarb said they tested the tank and the 'makeup water' which must be their pre-mixed sea water...and both test .1ppm.

I agree, test the R/O water first before you mix in salt. Salt shouldn't add phosphates, but its good to be 100% sure about your R/O water being the only source.
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Old 11-08-2004, 08:11 PM   #7
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Is distilled water that i purchase in the store ok to use as topoff water

Richard
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Old 11-08-2004, 08:34 PM   #8
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Have the LFS test it also maybe your kit is no good....... they say distilled water is ok to use.
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Old 11-08-2004, 08:41 PM   #9
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I think the kit is ok when i test the distilled water phosphates are 0.
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