The best is to use RODI
water for mixing new saltwater.
The best is to run a double sized protein skimmer, or there's more chance that you get algae/nutrients problems.
The best is to NOT use a canister filter on SW
tanks for filtration, as they quiclky become nitrate factories.
I don't recommand using anemone in a reef, as they can clug the overflow box and do a huge mess, or do like in a blender/mixer when going on a powerhead. I heard bubble tip anemones tend to stay in place.
Powerheads placement is fine tuning, you must determine where to place it by the flow it make. It's case to case.
Clowns don't require anemone in a reef tank. Only in nature.
They may host some corals/rocks or powerheads.
During cycle you should get ammonia and nitrites, so I don't recommand turning lights 24/7, as you can get an huge algae outbreak from this. Just run the lights as you would normally run them with established tank with corals and see if anything happen.