150gal for snowflake eels

[mbc230kfx400]

I have a 150 that freshwater now but i want to change it this summer. the tanks 48x24x31tall. right now its running on a fluval FX5(witch i love). What else do i need for filtration.
In the tank I want 3 eels, maybe two fish, some shrimp, and 6 kinds of coral. All would have to be compatible for the eels. i was going to get 2 Coralfile 24" dual marine lights. i know my FX5 will do salt with some new media. I was just wondering what else i would need. I want this tank to be on the low maintenance side.
This is the tank

[logemister02]

well you can start out filtration with a protein skimmer. some people find it necessarily to have, however, i have two tanks, and neither have a protein skimmer. one tank has a salinity of 1.017 ppm which i keep a freshwater moray in. (yes, i converted him to light salt). and the other runs around 1.024 ppm which houses my snowflake eel a banded coral shrimp and a long tentical tube anemone. i will be getting coral for the heavier salted tank,m i am just waiting to get my lights. i ordered some LED strips, (which is all you need to keep coral happy) off of a website called dealextreme.com , the shipping is free, and prices are vary low, it just takes a while to ship. getting both a marine chemical tester and a reef chemical tester will definitely be the most expense for maintenance. also, snowflakes stay pretty small, with a 150 gal. you shoule be able to get 4 in there before they get crouded, but be careful, they are clumsy and knock EVERYTHING over

hope i was at lease some help!