I successfully installed a Clarisea 5000 in my 625. I cut out the sump are with a taser blade. Huge pain but after 2 hours got it all out. I bought a mm to inch fitting and a gate valve to hard
Plumb it to return. Clarisea needs to be raised up. I have it 7” of bottom of sump on a stand. This creates more pressure so it will not use as much paper. Works great. Once in it is a game changer. I run 1000gph return and go through a roll every 3-4 weeks let me know if you have any other questions.