Sorry my mistake my MH is 250w, yesterday I installed a big fan over my sump, so far this has worked and keeps my temp between 26.2 - 26.3
So hopefully I've cracked it 
Thanks for the help.
__________________ Chris
60gl
1 x spotted Damsels
1 x Yellow Watchman Goby
1 x Orange Spot Goby
1 x Blue Tang/Palette Surgeonfish
1 feather Duster
Clean up crew (Turbo Snails and Hermit Crabs)
Xenia elongata
Euphillia paradivisa
Montipora digitata (beige/green)
Sarcophyton glaucum coral
Sun coral
LR
SSB
30gl sump
3000 LH sump flow
2 x 1100 LH power heads (circulation) | 
