The siphon tips, which are attached to the hoses, are the only parts of this apparatus that can be immersed in the tank. Use each handle and head assembly in one tank only and then sterilize by bleaching as described above for the siphon. Use two lengths of scrubber handles.
Heads are the same for both size handles.
Tanks that are emptied of fish need to be cleaned and sterilized before another batch of fish can be introduced. Drain the tank and remove it from the rack. Remove and discard all tape, air pipettes, and siphon tube netting. Clean all parts with brushes and a scrub pad. Once the tank and parts are clean they need to be sterilized in bleach.