Give me your flow rate and I'll calculate the UV dose. Wave unit is way more effective. E-mail me for discount kenl@wlimproducts.com
Keep in mind, UV does not stop algae from growing on surfaces. Good for bacteria, parasite and water clarity.
Okay...fx5 pushing 924 gph will get you a dose of 10.7 mJ. However, you are turning 4x the tank vol so you're about 44 mJ. Not bad. I don't know how you came up with 924 gph but if you take into account head loss and flow slowdown due to clogging of the filter you will be within the 50 mJ range.