RO membrane - Amazon

[reef tank 2.0]

I notice that a number of places sell the 75 GPS RO membranes for around $30-$40.
I've recently come across one for $18 on Amazon.
has anyone used this membrane? can you share your experience?

 

[ryanjohn1]

I think I use the 50 gpd one same brand. Is fine

 

[exnisstech]

I've used the 75gpd and currently using a 150gpd. They work fine for me.