We have introduced several new species of fish to our large marine aquarium this month, adding a large school of Yellow Sweepers (60 individuals), some Blue-Streak gobies, False Cleaner Wrasse, and a Convict Tang.
The Sweepers have been an instant favourite with our guests, displaying their characteristic tightly-packed schooling behaviour. We have also introduced more coral into the tank, which has made it look like a natural, diverse reef. Once we can maintain the fish stock levels, we will not have to add anything new for a while, and will allow the tank to grow naturally.
There seemed to be a mystery decline in the population of smaller-sized fish inhabitants, and then one day we spotted a resident crab in the process of eating a Basslet. We have been trying to catch the crabs with fish-traps, but with no success so far.
We have continued experimenting with our new water pumps, and have positioned them with a varying pulse to maintain full coverage with more random flow. We have ordered a new lighting system for the main tank, as the manufacturer no longer sells spares for the models we have.