Phosban causing issues in tank?

I noticed a lot of hair algae in my tank recently so last night I added Phosban. My tank is 80 gallons, so I added 50 grams of Phosban. Within a couple hours, my Blue Hippo Tank was turning white and started hiding under a rock. He also didn't seem to be swimming very well. I tested my PH and it was at 8.0. Usually it's about 8.1 -8.2. Does anyone know what could have caused this. I removed the Phosban last night and the Tang was still hiding under the rock this morning. He came out and ate when I put some seaweed in, but his color still didn't look good and he seemed to be struggling to swim.

 

Strange...I use Phosban...Never any problems. I also have Tangs (Blue included)

 

Did you rinse it well before use??

 

Yes, I rinsed it.

 

Do you think the slight change in PH could have stressed the Tang?

 

I doubt it..It was a very small change. How are you using the Phosban? In a bag? reactor?

 

In a media bag in the sump.

 

Phosban uses ferric oxide, this is not going to harm your tang. I suspect a coincident and something else caused your issue. I assume you checked everything?

For better results on the media it should be in a reactor so water is forced to travel through it. a bag in the sump probably permits water to travel around the bag reducing its capabilities

Anyother signs on the hippo? cloudy eyes, scratching, breathing issues ?

 

Is the Tang still eating and swimming ok? If so, just let things settle out. I would not run Phosban in a media bag. It is basically granulated Iron. It will turn into a brick if it does not have flow through it. I would look into a reactor.

 

No, no other signs. He ate some seaweed this morning and was swimming around, though he seemed to be struggling a little. I've had him for almost a year and never seem him like this. Any recommendations on a good reactor? Thanks.....