I just drip it in my skimmer every couple days works like a charm to keep my phosphates stable.
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I first heard of phosphate RX from Meleev... but didn't try it till few months ago. Actually, a local reefer had some Sea Clear commercial grade and swore it works for him so I got a bit from him. He said to drip it very diluted (1mL in 1gallon DI water) directly in to the skimmer. I had the normal 200 micron filter sock and didn't have 5 or 10 micron socks when I was dosing.
Think I dosed maybe a gallon over a week or so... I have a 25g tank. Think it did take my phosphates from near 1ppm to almost zero in that time...
But at the same time, my healthy 2 year old yellow tang started to develop red splotches all over it's body. The water never got cloudy at all but the red splotches appeared on the tang within a day or two of dosing.
Yeah yeah, i know it was getting too big for my 25g but wife got attached to it since we got it as a tiny baby and wouldn't let me sell/trade it.
Anyway, I stopped dosing LaCl and tried to treat the red splotches as bacterial infection with the 3 recommended meds I read about. No help. but it was still healthy, no behavior change and ate everything I fed. just was covered with the red blotches for weeks.
I ended up convincing wife to let me take it to LFS for quarantine/treatment. I think whatever meds they used did get rid of the red splotches within days. But a week later, it went missing and no one knew if they sold it, or worse... =/
I've gone back to GFO again but it is a pain and not as effective. Now and then I want to try LaCl again... I did buy 10 micron socks and it should be fine now that yellow tang is gone... but I don't know...
There's gotta be a better way...
I'm still on the fence... while i know it does drop phosphates, I don't know if I'd risk the life of another tang in the future... and for the same reason, I won't be adding another tang to my 25g.

That is a very small tank. I have a Hippo in my 60g and people ask me when I'm moving it into a different tank.![]()
I just lost my 3 yellow tangs. All 3 had red gills. I slowly dripped 1 mil seaklear commercial mixed in 2.5 liters RODI water in to my 250 gallon reef. Did not seem to bother the blue tangs or my powder blue or any other fish. But all 3 yellow tangs died with red gills the same dayThe redness that Ive seen when I considered using this product were the gills being burned.
I totally agree... I lost one out of 3 yellow tangs shortly after using it.. . Now I only have 1 yellow tang on my new reef and when I dosed only 30 drops on 160 gallon his breathing was super fast and he stopped eating... this morning he was fine it seemed so I put another 5 drops in and wammmmmm he is now hiding breathing fast again...this is with the a 5 micron sock in! So...yellow tangs and RX do nottttttttt mix well!!! definitely go slow... I am going to only dose 5 drops maxxxxxxxxx at a time....and even that may be lowered to 3 drops. TimAs the title states, Phosphate RX killed my fat and healthy 2 year old yellow tang.I have been going through a fluconazale treatment and noticed a rise in my phosphates from unreadable to .079 (per my Hanna Check). The treatment says 6 drops per 10 gallons will reduce phosphates by .5. So I did .5 / .079 and figured I'd need about 1/6 (at the most) of the dosage to drop my phosphates.
I went with 1/8 of the dosage and dripped the phosphate RX into my filter socks. Tank was cloudy which is suppose to be normal...I then went and checked on the tank about a half hour or so later and my fat and previously happy yellow tang was on the bottom, leaned up against the glass breathing hard...I scooped him out and threw him into a hospital tank...2-3 hours later he was dead. Bummed because I got him when he was a little guy or girl and he / she was pretty much a model citizen of my tank...I never saw him acting aggressively towards any fish. Mostly minded his own business and grazed on the algae clip all day.
I did some more research and found that a number of people have reported having issues with the Zebrasoma species and Phosphate RX. I'm not sure why this is unique to them, but it seems that I'm not an isolated incident of this outcome when using Phosphate RX. All of my other fish, coral, inverts etc had no problems with the treatment...
If you're going to use this stuff and have Zebrasoma specieis of tangs, BE CAREFUL!
Hi Mark, We did (Tom) as you advised to drop our insanely high phosphates and did a great job, yellow tang, wild caught and others had no effects. Thank-youI've been using it for years, as I mentioned in a recent video. I've had one of the Captive Bred hawaiian yellow tangs swim through it unaffected a couple of times, and I have a pair of wild caught Yellow tangs since 2011 that have been through it many times. As has my Purple, my Kole and my Naso.
Perhaps there was an interaction with the fluconazole treatment? The one thing I've heard but never tried to test for myself is an apparently drop in alkalinity. Some state if your tank's alk drops it could affect yellow tangs, apparently. I've never seen this happen.
It seems to work for some and kill fish for others using the same dosing methods. There is clearly something happening in certain situations. The problem is we don’t know in what situations the product will kill fish. Not worth the risk to my 3 yellow tangs or my irreplaceable moorish idol.Hi Mark, We did (Tom) as you advised to drop our insanely high phosphates and did a great job, yellow tang, wild caught and others had no effects. Thank-you
Debra
Well in this case it seems a 200 micron filter sock was used instead of a 5-10 micron sock.FWIW, some folks do report problems with lanthanum products, and many do not. I really don't know what exactly happens or why.
Well in this case it seems a 200 micron filter sock was used instead of a 5-10 micron sock.
www.reef2reef.com
This OP in this thread…just thought it worth pointing out it was a 200 micron sock used in this case, incase anyone was considering using LC, probably best to go as small as you can with the filter socks.Not sure which exact case you are talking about, but 10 micron socks are not always an answer:
"ok most may remember my first lanthanum drip into a 10-micron sock was a fail. I lost two tangs. "
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Lanthanum Drip ROUND 2 fight. lol
ok most may remember my first lanthanum drip into a 10-micron sock was a fail. I lost two tangs. here's the thread. https://www.reef2reef.com/threads/omg-have-i-killled-my-purple-and-yellow-tang-if-so-how.890745/ ANYWAY I have since revised/ UP'ED my filter sock game. i and others believe...www.reef2reef.com

