Can you use this product like the KleanWater...
Can you use this product like the KleanWater Chlorine treatment without first filtering the water. In other words, will the water be safe to drink with just the five drops of the MSR solution if the watersource is very clear and does not require filtration?
The solution is only killing viruses. It is meant to be used in conjunction with micro filter. It will not take care of bacteria or protozoa.
Strangers on the internet are probably not the best source for survival decisions.
That said, you can find emergency water treatment information from the Red Cross, FEMA or other reliable sources that will tell you that by starting with clear water, the correct quantity of sodium hypochlorite (the active ingredient in this product and in unscented bleach, albeit at different concentrations), and waiting 30 minutes, you will have water that is safe to drink. (Except for heavy-metal or other chemical contamination.) One piece of advice you'll see repeated is that the water should smell slightly of chlorine immediately after treatment.
Anecdotally, I have been told that this protocol is weaker against cysts like cryptosporidium, so if you're using a water source known for this risk, you'd want a water filter.