There have been no changes in our main display aquarium during January, and all species and corals continue to do well.
Jellyfish – Aurelia aurita
The sump system continues to work well, with no losses and minimal shrinking of the specimens in our large Kreisel display cylinder. Water changes are maintained at 35% every two days, with a larger water change when required.
Plankton production remains consistently good. The algae are continuing steadily on a four-day turnover. One of the 100L algae buckets was contaminated with rotifers, so a third rotifer culture has been started. Due to a delayed delivery of Nanno3600, the feeding of the rotifers was kept to a minimum, resulting in a gradual decrease in numbers. Since the order arrived, regular feeding has resumed, and Rotifer numbers have started to increase again.
Following the arrival of the new microalga (unicellular diatom Thalassiosira weissflogii), we are attempting to rear Artemia to adult stage in smaller 20L buckets to free up resources.