Just a silly display of 2 frames taken by a full-spectrum modified Canon EOS SL2. Frame on the left uses a UV-IR cut filter and on the right an STC Duo NB filter. The latter passes only a couple of narrow bands around OIII (in Teal) and Ha (in deep Red). Both were Custom White Balanced on a white bit of plastic around the pool.

Note: the Duo-Narrowband exposure was 1/100 sec at f4.5; effectively 15x longer than the left frame.