The pre filters and membrane seem to be pretty standard, even though they are listed as being "2-3/4 inches high" It's hard to tell from the photo if the di
cartridges are refillable or not. My experience says that refillable is more desirable than non.
My personal opinion: If you are going to sell something to the public and make it a point to say that you are shipping from the USA, at least try to sound like you can speak English. I suspect this to be an importer that is operating out of cali. Support on an item like that is likely to be non existent.
I know a buck is a buck, but take a look at something like this:
Aquarium Water | Reverse Osmosis | RODI Water | ReefKeeper Water | Typhoon 5 stage RODI Reefkeeper 75 GPD
They are a good company to deal with. All standard parts. I use this unit and can not find anything bad to say about it. I have found that I like buying filters and di
resin from Bulk Reef Supply - Bulk Reef Supply
Just an opinion.