Yup, from the site
" Return Jets are available in two sizes for either 1/2" to 3/4" ID hose, or 3/4" to 1" ID flexible hose.
The reviews say that the fitting is very tight for 1/2 hose, which is a shame.
This pump would be an excellent replacement if it fits?
https://www.bulkreefsupply.com/sicc...D=2700&indexName=brs_prod_m2_default_products
AI seems to indicate it will fit the chamber dimensions you listed
AI Overview
The Sicce Syncra Silent 1.0 pump is a submersible pump with a flow rate of 251 gallons per hour (GPH). It measures approximately 3.54" x 1.89" x 2.83" (length x width x height). The pump is designed for aquarium use and can be used either submerged or in-line. It also features a synchronous motor, adjustable flow rate, and a long-lasting impeller and shaft.
Edit:
Never mind, but the one you posted is 3/4 inch diameter hose, which is fine just make sure the pump outlet also handles 3/4" and you should be golden.
Start a build thread.