We had green around the walls of our Coleman 18ft pool and went to local pool store for them to test water. They suggested shock two times first day with packets and stop yellow (algaceide) which we did then the second day to shock again (1 bag) , which we did and we were suppose to add 5 lbs of alkalinity bag you mix with pool water that day also, that step we forgot . Our pool is not any better two days now, so we added the alkalinity today. Stabilizer is suppose to be added after it is clear. We do have standard pump/filter still that came with pool that my husband modified for a fountain. We ordered a new sand filter pump/2100 gph that will be here in three days. Any suggestions what we can do for now??