we have septic here and there are some great products you can use that are septic safe
domestos of course - cleans and sanitizes everything
the earth choice stuff is great too- i use the toilet cleaner, dishwashing soap and floor cleaner
i also use a disinfectant you get from coles- its in a purple bottle that is plant derived- its great, smells yum but i cant remember whats it called
there is also a great shower cleaner i use as well - something like shower power i think its called
the method cleaners are also good too
really didnt find it too hard to adjust to septic as i thought it would be
just read the back of the packet
btw i throw a sachet of yeast down the toilet every few months to feed the bacteria. seems to keep the septic going too