I don't know if this shows anything.
An easy way to show the flow is to use a turkey baster and forcefully squirt some tank water into the tank, to create bubbles. The flow will then push the tiny bubbles around the tank reveling the flow pattern for a few seconds.
Even better is to do the same thing near the intake of your return pump - that works really well too.
this tank would really benefit form some Random Flow Generators. It's hard to tell for sure, but it look like it probably has 1/2in Loc-Line or some version of module hose that is similar to 1/2in Loc-Line.
based on what I see, you would likely just need the RFGs, and not a flow full kit
Flex Series 1/2in Random Flow Generator – RFG050-FLX
Flex Series 1/2in Random Flow Generator – RFG050-FLX | Vivid Creative Aquatics
vividcreativeaquatics.com
