How do you change the media in these?

[borillion]

Do the bottoms just screw off of these? I have always used tap water because the quality is so good, until this more recent tank and I have no idea how to replace the filter media.
The Bulk Reef Supply guys just want to sell me inserts ( https://www.bulkreefsupply.com/brs-4-stage-value-replacement-filter-kit-bundle.html ), but to take it apart first to verify, what media is in it. Even though I was pushing back and suggesting I should be getting one of these. https://www.bulkreefsupply.com/4-stage-value-100-gpd-ro-di-system-bulk-reef-supply.html

 

[DC Reefer]

Not familiar with those particular ones, but it looks as if the bottom screws on and off.

 

[borillion]

Lol hopefully there isn't loose stuff in any of these. Might be messy

 

[DC Reefer]

Lol hopefully there isn't loose stuff in any of these. Might be messy

might want open them up outside

 

[SHNICI]

Like I member (I saw this model once) the filter media are closed on Clips. Isn't going to be easy to open them, and if you use tools and bend the plastics during opening them after they will leak. Just in case, check is it glue on the GAP on the bottom side where are the "glanges" if isn't glue, try to twist the end section keeping the main on plase, if it only twist w/o unscrewing then is on clips.