Need urgent fungia help

[Step Johns]

Alright so i have been having some issues with my fungias as the title suggests. I started with five and am now down to two and it looks like i will be down to one soon. All of them looked amazing at first, always puffed up eating but then slowly one by one then started declining and then just eventually died. Im at a loss as to why though, all my other corals look great and im having fantatic growth on everything. My fungias are in lower light and moderate to low flow. I have on that looks great where it is right now and two that look like the flesh will start peeling off any day now. What should i do to try and save them? I can try moving them up higher? To more flow? Give them to a local reefer and see if they can save them? I just dont know what to do anymore, if lose these two and compared with the other two i have already lost im looking at a large financial hit

 

[GPB]

How long have you had them, tank parameters, pics. Need something to go on.

 

[Step Johns]

Had the green one for about three months and have had the blue and teal one for almost two. I have a 25 gallon solana with 72 watts of leds, a tunze 9002, two koralia 425's. I use red sea coral pro salt and do a weekly 5 gallon water change with it. These two fungias are in the front left corner of the tank on the sand bed. Both of them looked great until this past week but that is how it has been going with fungias for me, they look great then all of a sudden take a turn for the worse.

 

[Step Johns]

So i raised the green one up a bit and it has puffed out a little already so i have hope for it

 

[Step Johns]

I did a lugols dip on both of them and the blue one didnt make it. It was completely dead within a few days but the green one is doing great and is starting to color back up really well. I wish i knew why fungias keep dying on me, this is the third one that has died so im lost as to why this is happening.

 

[dz6t]

bacteria infections on sand bed