HELP! Controlling High Phosphates...
- Thread starter WeedyDragon
- Start date
yogoshio
New member
http://reefkeeping.com/issues/2006-09/rhf/index.php#16
The first method of removing phosphates on here discusses high alk/calcium/mag can help reduce phosphates as well as pH factors in the process.
"If the calcium carbonate deposits are growing, then phosphate may become buried in the growing crystal, which can act as a sink for phosphate, at least until that CaCO3 is somehow dissolved. Additionally, if these crystals are in the water column (e.g., if they form at the local area where limewater hits the aquarium water), then they may become coated with organics and be skimmed out of the aquarium"
The first method of removing phosphates on here discusses high alk/calcium/mag can help reduce phosphates as well as pH factors in the process.
"If the calcium carbonate deposits are growing, then phosphate may become buried in the growing crystal, which can act as a sink for phosphate, at least until that CaCO3 is somehow dissolved. Additionally, if these crystals are in the water column (e.g., if they form at the local area where limewater hits the aquarium water), then they may become coated with organics and be skimmed out of the aquarium"
gomery12
New member
I use GFO and a hanna checker. I did have some cyano show up about 2 weeks ago, but it was right after I changed my GFO and now I have nothing. I run the BRS High Capacity GFO through my reactor. It runs all day and night, change it every 30 days. Phosphate is 0.02-0.03 on my hanna. My purple plating monti shows new growth after about a month in tank. Haven't seen any disadvantages running it.
WeedyDragon
New member
Well I had the LFS check their water. Zero phosphates. So, Im wondering if it was spiking because of the coral food?
I did another water change and extensive cleaning. As an experiment, I bought a sock and some Pura Phoslock to throw in a skimmer chamber. Lets see how that works.
I did another water change and extensive cleaning. As an experiment, I bought a sock and some Pura Phoslock to throw in a skimmer chamber. Lets see how that works.
Lil BamBam
Premium member
GL!! Keep us posted 
infinite abyss
New member
Good advice. Phosphates must be coming from somewhere.. Try to find the source.
I would 1) Get it check with legit test kit. I test my out with api but maybe check with a fish store like beyond the reef(they use red sea i think).
2) Find source.
3) Have you been feeding a lot? I think phosphates rise dramatically when you overfeed or from uneaten food particles on sand bed.
4) Come in contact with sand a lot? Just moving the sand around can cause big rise in phosphates. Combine that with uneaten food and overfeeding + sand movement(could release high amounts of phosphates at once through the source of your sand bed).
WeedyDragon
New member
yogoshio: I completely missed your comment. So normally my Alk is around 8-10 dKH. I do not supplement since a have a hand full of corals and have been doing weekly water changes using Red Sea salt. But I just tested it and its really low now! I did a 25% water change a few days ago and added the GFO sock to my skimmer. New params are at:
Alk- 6.2 dKH
Ca- 375 ppm
Mg- 1300 ppm
pH- 8.0
Ammonia- 0
Nitrite- 0
Nitrate- 0
Alk, Mag, and Cal all got lower when I would imagine the addition of fresh saltwater would raise them or at least keep them stable. Now Im really confused.
infinite abyss: Ive been having my LFS test my phosphates weekly with their Red Sea kit. I do not think I am overfeeding. Although I was using a coral food once a week which might be the culprit. I only have a hand full or coral, so Im thinking that might be the problem. I didnt even think about the sand. I do thoroughly siphon my sand bed when I clean the tank. Not down to the bottom, but my bed is about 2" deep, and at most I get down .5".
WeedyDragon
New member
So does running GFO have any bad affects on SPS corals or snails? Ive noticed that my acro has not had good polyp extension and my turbo is hardly moving the last few days.
Lil BamBam
Premium member
How much GFO is being used and is the tumble low or fast?
infinite abyss
New member
IMO Buy the mixed SW or RODI water from your LFS and pay to have them tested. If results aren't good, request a refund
I did this with a LFS by my house using a TDS handheld tester to test the RO/DI water.. Lets just say algae free now and have my own unit to make water
Good thinking, to test water from local fish store...i plan to get my own rodi also, hope to test the lfs water in the meantime
Maybe ill inspect the lfs tanks for signs of algae too.
infinite abyss
New member
just out of curiosity, how do you go about doing water changes?
do you use pump and suction out water from the bottom & between the rocks?
....keep us updated...i'd like to know if its the gfo or something else.
do you use pump and suction out water from the bottom & between the rocks?
....keep us updated...i'd like to know if its the gfo or something else.
WeedyDragon
New member
Well right now I am running about 2 tablespoons (29 gal tank) of GFO media in a sock. Its placed in the return skimmer chamber so Im not sure about the tumbling.
Every time I do a water change, I clean the acrylic, use a baster to blow off detritus from rock work, start by siphoning the sand bed, then move to water column to suck out suspended detritus. (In that order)