Keep in mind, the next 3 shots are all cropped down to the EXACT same size.
We will start in the same order as above.
Control
T5
Flash
Control close up
Notice the sharpness really takes a hit with these settings
T5 lighting.
This shot is almost acceptable as far as sharpness goes. I actually wouldn't mind using this setup in the future when I do not feel like taking the flash out. However, for some reason, taking this light out and taking it towards the discus tank completely freaks them out!
2 flash setup
I like this one the best, and you can see it is the most sharp.
I hope you liked this demonstration
Edit, as an added bonus, I hadn't realized that these were ALL the same discus. This really makes this an apples to apples comparison.