Originally Posted by 1journeyman
No... don't use tap water. Heavy metals, phosphates, etc. in tap water are bad on a SW tank.
Get Fenner's "A Conscientious Marine Aquarist". The book describes the different type of saltwater tanks, lighting, filtration, etc.
After you read and have an idea about what type of tank you want it becomes much easier to estimate a cost.
It's a great hobby, but there is a learning curve a bit steeper than a typical freshwater tank.
okay well with the tap water i could argue that it is so terrible that you cant keep fish at all, ive kept a tank for about 8 months now and 2 fish for about 6 or 7 months..the same fish but i would say that it isnt and can cause you problems, i may have been a little on the lucky side and not have had any problems using tap water. no diatoms till i got a new light a week ago but as result that i know tap water inst the best 2 days ago i bought a RO unit. i may have been lucky but im just stating my opinion.