Is this enough?

Yes and no. Those are pretty good base nutes. I have been using the Pro Grow and Pro Bloom for a while with good results. The reason I say yes and no is because there are other factors like are you using RO water or tap water if using RO water you will need CalMg. Also a sweet is a good idea to use in flower.
 
For that many plants it would be cheaper if you got a powder nute instead of a liquid. I am getting a free sample of a powder nutes call Veg+Flower. Something you may want to look into.
 
the grow is 20 plants and can you suggest any other product on that site for me please?

If you have the time and money I would suggest this https://www.rollitup.org/organics/539844-subs-supersoil.html I started using it on my 3rd grow and I will never use anything but a super soil...Dankster420 also has a recipe for a super soil I am getting ready to use...it's still "cooking" right now but should be ready in a few days...good luck and welcome to RIU...
 
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