TSP & Acid Soak ?

Question on step #3.
Do you have to dump the TSP mixture before doing the acid bath?
Do think it would be a problem is you added the 10:1 acid mix to the TSP mix?
I was thinking a soak in TSP followed by and additional soak in TSP + acid might be beneficial but my HS chemistry (its been a long time) thinks the base of the TSP might reduce the benefit of the acid. thanks!

To chemically clean the grids/ nest:
1) Have a bucket/ container large enough to hold the entire assembly
2) #1 Add some TSP (tri-sodium-phosphate) to the water or some electric dishwasher detergent to the water and soak the grids for 3 hours – this will ‘de-grease’ the membranes and is the first step in cleaning them, rinse with hose and get ready for step 3.
3) Dump the container, refill with water and add muriatic acid* to the water so that you have a 10:1 water: acid mixture and soak the grids for another 3 hours, this will clean any calcium off of the grids. Rinse grids again and reinstall them in the filter.
4) Now, run pump and bleed off the air from the filter and add 100% of the DE the filter calls for.