HI
I have baby fish

that are 2 weeks old

got a live plant in with them, (since they hatched), but i think it is starting to die (going brown)

should i remove the plant or will it be ok, or will it harm the babys? also my mum wants to top the water level up,will this be ok or should she wait untill they are older? and how can you tell what type they are going to be, got a common goldfish in with fantails, we think the 2 fantails are the females both laying eggs at the same time

and the common goldfish is the male as he has been doing the chasing.
Any help will be great.