How can I kill this purple sponge?

[OGFrenchHorn]

So I have this purple sponge that grows on random corals. It first took over a colony of candy canes, then a colony of Hawkins, and now it's taking over a colony of cats eye. I've tried exposing it to air and pouring hydrogen peroxide on it but all it does is tick it off for a few days then it's back to normal. I've stoped dosing sponge power to slow it down and I moved it up closer to the light to see if that will work. How can I get rid of it without harming the cats eye?

 

[Texas Reefer]

More light?

 

[OGFrenchHorn]

More light?

I've moved it to the highest rock in the tank right under the AP700 in hopes that it would work

 

[DSC reef]

Manual removal, a tooth brush or smaller type brushes will work

 

[saltyfilmfolks]

Manual removal and reduction of carbon dosing and the feeding of aminos

 

[Milkmanskid]

It’s actually kinda nice looking lol

 

[saltyfilmfolks]

It’s actually kinda nice looking lol

Manual removal and shipping.

 

[XNavyDiver]

Put it in my tank. It's a sure death sentence.

 

[OGFrenchHorn]

It’s actually kinda nice looking lol

It is. I bought a sponge years ago and 4 set ups with the same rock and its back. The problem is that it's killing the coral it decides to grow on. I had a huge colony of candy canes and it whipped it out. I was only able to save three heads. I'll have to post a pic of the after math. I threw that piece in my refugium and it's taking off in there

 

[nano reef]

Put it in my tank. It's a sure death sentence.

I saw some really pretty and bright sponge corals. Very inexpensive. I am a newbie and infact havnt got my first coral yet. I thought it would be a great idea to add color and size, but cant find much info, so not a good idea?