Following up on observations of changing fish behaviour when either lighting or flow rates are changed, here we take a look at what happens when the lights turn off. The video shown starts after the Kessil A80 light has been on for nearly 6 hours, the typical photoperiod for the current setup.  The tetras and […]

In transitioning from a low tech to high tech tank I noticed a significant change in the behaviour of the fish* where they used to swim mostly at the top/middle regions of the tank under low tech conditions but then spent a lot of time at the bottom with the high tech conditions.  At the […]

I’ve been running the Kessil A80 light for 6 hours per day on the maximum intensity.  The aquarium looks nice either with the lights on or lights off so here are some contrasting photos. With the lights on, the fish tend to stay at the bottom of the tank.  With the lights off they are […]