good ole fashioned 1cm per litre rule thingy
Well you have decent filtration so you can use the good ole fashioned 1cm per litre rule thingy
81l / 4cm (Rosys are 4cm adult) and you have.....20ish!
10 will be fine and look/act/behave better than 5 too. Win win 😀
Then you could get 15 CPDs too.........Am I a bad influence
Now where did I get 81l fromActually the 60p's only 65ish litres empty, mine's probably got 50 litres of water maximum.