Help my Bounce!!!

[Tegridy Reef]

I bought a bounce 6 months ago and has been doing great. Recently I started feeding him very heavily. He got super inflated and was super happy. now the last two days he has almost diminished. very confused he went from the biggest and happiest to the smallest thing ever. Havent Lost him yet did a dip but still small do yall have any advice. I am hoping he is pooping but idk what yall opinions are. grantit the shrooms is really small I got him on a live sale and thought was bigger but any advice thank you
water prams
NO3=10
PO4=.09 just changed gfo and crabon
cal=500
Mag 1480
alk 8.3
salinity got to 40 got it back down to 36