mollies

Hi Guys, I have had a marine molly community for a week now. I have kept other fancy marine fish, corals, anemones before, but decided to sell everything and just do some something simple and easy. Tank is 150L. Lights are cheap 2 USD each LEDS. Using a canister filter (sunsun304B, 2000LPH)...

I was just wondering if common mollies (poecilia sphenops, not any of the sailfin species) need salt to thrive and breed if my water is already pretty hard at 7.6-8.1 ph.