How do I unblock my plughole in my shower cubical without......

[murphyslaw]

those nasty chemicals!

Have tried fishing hair out with a coat hanger but the damn thing is still partially blocked.

Need to be careful what I use as we have a septic tank and this shower goes via a saniflo system.

Any natural suggestions please

Chuck a good load of soda crystals in and flush down with VERY hot water.

Clean out the hair, then pour down some bicarb and some neat white vinegar which will go all fizzy and help dislodge stuff. Leave for a bit, then run very hot water down and use a plunger (we have a mini one for this purpose) which will dislodge the big stuff (close your eyes if squeamish becuase some of the nasty stuff comes back up first). I do this every couple of months and it keeps all the sinks fresh & clog free.