A few questions. Anyone know of a supplier of a domed, cover, motorised or not, not inflatable. In the absecnce of that, what about a standard retractable pool cover. If I have a permanent roof built over the top, how to stop pigeons roosting underneath? Given all the dust and crap in burning season, I want something to keep it clean. If I go with retractable, is it best to have it built in when pool is constructed, or retrofit? How successful is retrofit and how good does it look. Lastly, overflow or not overflow. Pool builder says not needed.