Although typically sold as a freshwater fish this is not strictly the case (see ‘Habitat’), thus the addition of a marine salt mix should be considered mandatory. Aim for around 15 g/l although it is not essential to be exact.
In terms of décor this species relatively unfussy although it is essential to provide plenty of cover in the form of rock piles, lengths of pvc piping, etc.
A high proportion of dissolved oxygen and moderate degree of water movement is recommended, although a protein skimmer is not required.
G. tile is sensitive to poor water quality and should never be added to biologically-immature aquaria, while weekly water changes of 30-50% aquarium volume should be considered mandatory.
A tightly-fitting cover is also required since Gymnothorax spp. are prodigious escape artists