Foe water I just us a regular aquarium pharmaceuticals DI filter on my 46 and IMO it dose the job. For salt I use instant ocean simply because it is fast dissolving and cheap witch I relay like unlike Kent where I herd that it takes for ever to dissolve and it is quite a bit more. With Instant ocean you have to add your own supplements witch takes no more than 2 minuets.
Like mentioned before salt is your own preference.
HAPPY REEF KEEPING
__________________
10g softie and LPS tank(SPS soon

) coralife 28w 50/50 rio nano skimmer
Live stock
-1 Pulsing xinia
- Green candy cane
- green zoas
- GSP
- Fake percula clown
- Diadem dottyback

adding a 70w MH with 8 LED