Couple of questions

[manny]

I'm supplementing B-Ionic. There shouldn't be a problem while I'm using that though, right?

[GaryP]

Most iodine supplements are sodium iodide. I think what's happening is that the oxidizer in Chemi Clean is oxidizing the iodide back to iodine. I can't see how the iodine would be a problem because Lugol's solution containes iodine. I think rather that the oxidizer is being used up by the iodide rather than working on the cyano. All waters have a certain "demand" that soak up oxidizers. In municipal water treatment they add enough chlorine to compensdate for the demand plus enough to give the desired residual.

Amount added - demand = residual

The iodide is probably increasing the demand and thus reducing the resulting residual. Of course you don't want a really high iodine concentration as it toxic. I suppose it depends on the amount you are starting off with. Some corals and most algaes soak up iodide fairly quickly. I actually soak my Xenia frags in a fairly concentrated water with Lugol's when I mount them.

Gary

[Instar]

After 24 hours phosgard is reported to leach phosphate and aluminum into the tank. Use it and get it outta there. Also make sure if you use a second charge of it, that its really washed well.

[robertpower3]

Also, does anyone know of any lfs's that will test for copper or have a tds meter?

You can use a red sea copper test I believe they are like $15 as for the tds I'm sure someone would let you borrow there's if you ask

[manny]

I'll be removing my phosgaurd from now on after a couple of days. Thanks for the heads up Instar. Only thing is, I wonder why on the label it says that phosphates and silicates won't be leaked out. You'd think they'd say to replace it as often as possible so they could sell more of their product. :?

RobertStar, I was wondering if any lfs's could test for copper since I don't really wanna spend any money on a test kit I probly would use very rarely. As for the TDS meter, I'm still lookin around but I may not need to test my rodi water after all.

The chemi-clean worked like a miracle!!! I still have some very small patches here and there. It's been 48 hrs and I'm gonna do a water change later today.

Should I dose one more time like the directions say or wait a few days??

[manny]

Well, cyano was gone for awhile but now its back again :evil: dangit. and i have to go home for the weekend so i won't be able to do water changes or keep an eye on it. I have no clue what to try next. Bought some nassarius snails and ceriths to keep my sand sifted but it doesn't seem to be working. With 20 nassarius, 18 cerith, 12 astreas, 2 scarlets, 1 large brittle star, and 1 large serpent star I figured everything would stay clean but nope. Any ideas of what could be causing the cyano prob that i can't friggin get rid of?