1- Stop using the Algae Destroyer. It is a chemical algaecide and has to be used continuously to keep the algae from growing. It is a band aid to cover up the problem. The phosphate remover is fine...phosphate is often a cause for excessive algae growth.
2- Make sure your expectations are realistic...this is a pond...there will be algae. A pond without algae is unnatural and unhealthy. Cloudy green water and gobs of floating algae are indicators that things are out of whack. A short fuzzy or slimy layer on the rocks and liner is healthy. That layer is alive with not only good algae, but beneficial bacteria and other good bugs. When you drained and washed the rocks, you destroyed this good growth. It will take time for it to redevelop and balance things out again. 6-8 weeks is not unusual and the cooler the temp, the longer it takes. It very likely will get worse before it gets better. Whatever you do, do not drain the pond or scrub/wash the rock and liner!
3- I don't see any plants in the pond. Plants are a key component in a clear, healthy pond. Algae needs 3 things to live - water, sun light, and nutrients. Limit one or more and you will not have an algae problem. You can't get rid of the water, so that leaves light and nutrients to deal with. Plants can take care of both. They will cover the surface of the water and block out the light and they will absorb excess nutrients from the water, starving out the algae. Some plants are more helpful than others. Water lilies are excellent for shade. Water hyacinths and water lettuce serve double purpose...they are floating plants, so they shade the water plus they draw all of their nutrients directly from the water. Submerged plants are also excellent for using excess nutrients. Anacharis and Hornwort are two common types.
4- The bubblers are beneficial...they won't encourage algae.
If this was my pond, I would not add any more additives (bacteria additives are ok), I would add a bunch of plants, and then not touch the pond for a month. It will probably get worse before it gets better, but it has to go through the cycle to balance itself out.