Help! Frogspawn/Hammers in Trouble!

[BlazingArrow]

Hi guys,
I woke up this morning to my 2 Hammers and a frogspawn all retracted quite a bit. I did a 25% water change to see if that would help. But nothing has really changed. I noticed a couple little brown spots on the tips of the frogspawn and then a few also on one of the hammers. It almost looks like its burnt?
Last night I added a 2 monti's, some zoa's and some paly's.
I should mention that I did just swap to this tank with higher lighting. I went from biocube PC's to a MH. So I cut back on the lighting schedule, but have been increasing. (Perhaps too fast...15 mins per day?...)
Just in the process of re-checking parameters. Everything was bang on earlier though...
Any suggestions?
Will post parameters and a photo too shortly...
Cheers guys