For concerns when deciding: Little liters, therefore more frequent water changes needed. That does not tolerate any fish and the "uncomplicated" Armano shrimp have not liked it ... When Wasserwechssel have to remember you that you can reach the pools well from the top must and the "home court" any 10 cm wide (so previously times hands measured ;-))).
One should not have too many "animal lovers" un d gooders to friend, otherwise you will indeed whether the beautiful thing praised, but also taught ....
Cons: no existing mounting the lamp. The filter is small and by now a year in use, it is buzzing after three days because looseness ... Better quality of new investment is sought and hoped for (once the old "finally" give up his spirit). Cable management is not solved discreetly.
Conclusion: For me and my family the Pro weighs still on the small Umständlichkeiten.
