need help on xenia and polyp

i have a really good question
i have heard about the salinity getting too high in the nano tanks because the water evaporate but in my tank the salinity goes down
 
how to you compensate for evaporation?


water evaporates from your tank. in order to keep the SG consistent, you need to copensate the evaporation by drippin FW (fresh water, no salt) into your tank.
 
i just poor water in and it has never evaporated that much
i think its because of the 28 watt light
people say that it weak
 
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