Keith
is it private or public?
do you have a TM and spinner tool? best way as waste get sucked away really fast. I have done public ones with scrubbers and wet pickups in the past.
Soil level will have a big say the complete method you can use. goes without saying that you don't want any thing harmful to humans going in the pool. test different products to find out what works best, and safest.
If you are going to clean shower areas you find that there will be lots of body fats on the tiles and you will need a very good product to get this off if you don't want to use to much elbow grease. products safety is not so much an issue here, so you will be able to use something stronger. get premier products number.
good luck
respectfully
ian harper