top up with tap or salt water?

i have had my tank for almost 4 weeks.
right now i only have
01 x blue sponge
01 x orange sponge
01 x green polyp
01 x red polyp
2 pieces of live rocks
01 x box fish
01 x tube worm

since u know what's in my tank. may i have some advice on what's do i have
to do to keep the stocks i have to keep them healthy and alive? so far what
i do is just add calcium solution, interpet liuquified food and brim shrimps
for the box fish.



"Teeb" wrote in message
...
For topping up due to evaporation you only use dechlorinated tapwater. The
salt does not evaporate out with the water. When you replace water due to
a
water change, you add salt making sure the salinity is the same as what is
already in the tank.
How long have you had your tanks set up and what is in them?

Teeb

"Elliot" wrote in message
...
Hi,

i am new to marine tank keeping. would like to know what type of water
do
i
use to top up my tank water level due to evaporation. my evaporation is
very
fast bacause i am using 2 fans to cool my water.

Thanks!!!!