Monti cap frag question

Hey guys,had a question about my monti frag its been in my nano for almost a week now and its not losing any color but two days ago it doesnt open as much and looks kinda thick.Its on the sand bed and under two abi par38 12w led bulbs half daylight and half atinic.All parameters are good beside the salinity level that am currently rising slowly(is at 1.022 atm)My frogspawn seems to be doing perfectly fine so i dont know what might be happening.Ill see if i can get any pictures up.Thanks in advanced