Hi Judyk,i used to use instant ocean salt,which at the time i thought was the best,but started using nsw the difference is unbelievable especially with the corals,if you do regular water changes depending on your coral load the only additives you would need is for calcium an alk,all i use is bi-onic.colecting the water is actually the hardest part,i drive maybe about 15 mins to get the water then i fill up5 gln buckets,i guess because of my love for the hobby its no great work,is there anything more magnificent than having a part of the ocean thriving inyour home:thinking: