What and why?

[Lenny_S]

I'm using Phosi-ex by Nyos & have good results & best of all its clean to use

@Twoby2, never tried that before. I tried RowaPhos once and was really disappointed, it has these fine little pellets and doesn't work good in a reactor or even a mesh bag. What is the form of Phosi-Ex? Can you post a nice closeup with a dime for size reference?

 

[Hawain_Rob]

Update. I used phosguard and it did the trick! Cyano is gone. Thanks to all that help me solve my problem. You guys know your stuff.