RO unit

[saxoakos]

I just need some help to choose an RO unit for myself.

 

1 http://www.coralreefuk.co.uk/product_info....848b496bd1b3f1c

 

2 http://www.coralreefuk.co.uk/product_info....848b496bd1b3f1c

 

 

I hope someone will be able to help me i know the more expensive is better but do i really need it?

[Akwarius]

#2 just has extra carbon, the membranes and di are the same.

[saxoakos]

#2 just has extra carbon, the membranes and di are the same.

thanks for help i thought 2nd one will be ok for me.

[saxoakos]

How often do you have to change carbon and sediment filter? Also how often do you have to change resin in the DI filter?