There was a notice on the enclosure stating that water levels in the enclosure had been reduced due to cleaning. This photo uploaded by zoogiraffe a few years ago gives a better idea of what the enclosure looks like when the water is full.
Based on previous discussions about the enclosure, it seems that with Natureland's position next to the coast, the penguins benefit from the exhibit water being natural seawater. The species has even apparently bred in this exhibit! However, the enclosure currently only holds two penguins, which based on signage on the enclosure, are one male (34 years old) and one female (12 years old). With the male being particularly elderly, I can't imagine this a species that Natureland will carry on with for much longer, without serious adaptions to this old enclosure, with it certainly being one of the smallest and weakest penguin enclosures I have seen.