FixLake is a useful plugin especially in uhc it allows to fill the water surfaces
Commands:
/fixlake help /fixlake <radius> to fill lakes around you /fixlake versionto see the plugin version /fixlake setlang <lang-fr/lang-en>to change the language /fixlake reloadto reload the configuration
Permissions:
for (help/fixlake/version)
for (setlang/reload)
Warning: I advise you not to abuse the range due to the risk of lag. (The plugin is optimized, but generating a large radius will take longer)