Here is what I use with fantastic results. Some very noisy LPs have become nearly silent.
Taken from an extensive discussion on AK:
50ml Triton X-100
38ml Hepastat 256
72ml 99% IPA added to the Triton and Hepastat
mix the above in a container (I use an empty IPA bottle) and as you can see, the total is 160ml.
Fill the 6L tank with about 5 quarts of distilled (you will see that brings the level to the FULL mark inside the tank).
Then, measure 20ml of your solution and pour that in the tank, followed by an additional 150ml of IPA (I've used up to 200ml but don't notice any benefit). Turn the tank on and let the transducers run for at least 5 minutes to "degass" the mix and you're ready to add records.....that is, after the tank heats to the desired temperature.