New Tank Smells

[Animal77]

Hi guys, after a 7 year break from the hobby, I have just started a new 500l tank. It has been filled for 3 days now and has become really smelly. Not just ocean smell but like something is dead in there lol.
I haven't fired the skimmer up as from memory I gave it a good couple weeks of running before doing this last time. Any suggestions?

[mcgyvr]

Are you moving the water or just letting it sit stagnant?
Filled with what?

[Animal77]

Yea the sump is active and I've got a wave maker in there working as well. Running dupla salt and mixing myself. Should I crank the skimmer up now?

[thegrun]

Do you have live rock in the tank? If there was any die off you would expect it to smell.

[Animal77]

Yea we have a around 40kg of live rock, yes could be a bit of die off, just never had that smell except when emptying the old skimmer cup

[SFish]

Put air fresheners all around the tank : )