Using seawater for water change

[Avrilovigne]

Is it advisable to use seawater for water changes? I'm tempted to make this regular by buying from LCK.

Is it cheaper than using salt mix in long run?

Are there benefits over tap water change to fish or corals?

[kraken]

what is the size of your tank? May uses NSW for water changes also, whether it is economical depends on the volume you use really.

Using tap water encourages algae growth since there are many impurities inside, you can check the water using a TDS meter