Plankton Production – Our plankton and algae cultures are used as the main food source for the residents of our Fish Lab.
– Algae – the culture has been productive, with approximately 1600L generated
– Artemia – stable, with 4.5g cysts hatched daily. We are also growing-out a separate culture of adult Artemia to feed our larger predatory fish, including the yellow boxfish and saddleback pufferfish
– Rotifers – average rotifer count of 425/ml (target 300/ml)
Jellyfish – Aurelia aurita
Our jellyfish brood from the 24 September strobilation are growing well (2cm bell diameter), so we have relocated them into the larger 25L Kreisel. They are currently being fed 200ml of Artemia culture twice daily, to grow them for restocking our main jellyfish display tank in the coming weeks.
Seaweed Mariculture – edible sea lettuce (Ulva lactuca)
Our edible seaweed culture trials have not been as successful as hoped. Although the culture is still alive, there is minimal new growth, so we are investigating and researching further methods before restarting our efforts.
At Kura Huraa, our aquariums, turtle tanks, and coral pools rely on a main water line to draw and circulate fresh sea water from the lagoon. Should the system ever develop a fault, there is a risk of introducing micro-bubbles into the circulation, which can be devastating for aquarium life. This month, the main water line (into the pump) actually started sucking up small amounts of air, highlighting the urgent requirement for a backup system. In case of an emergency, this would allow water to continue circulating, and give greater control over water levels.