get the skimmer before you add anything to the tank, a 20g is just fine for an anenome (i kept one in a 6g) as long as you have the right lighting. before getting the anenome make sure to do your homework or you will have problems, they are not as easy as many hope.
expect 6 weeks to cycle and then at least 6 months before you add an anenome.take it slow and you will be fine.
Skimmer skimmer skimmer skimmer
expect 6 weeks to cycle and then at least 6 months before you add an anenome.take it slow and you will be fine.
Skimmer skimmer skimmer skimmer