Kasei, you should specify if this is the old one with the thumb screws or the new screw top.
Dean, it is a good reactor, i've used it for a long time (i recently sold mine as well to upgrade to the newer one and save my thumbs from the screws).
FWIW, the only difference is the screws which is not that big a deal,
Fills with 130 grams (250ml) to 200 grams (385 ml) of PhosBan.
Recommended flow rate: 80 gph for 130 grams PhosBan, 90 gph for 200 grams.
17.5" x 4.5" Footprint.