for me oscars always have to be the biggest to be happy and plenty of water changes, i always prepare my water first in a 55gal for acouple days (declor,temp,airate) then add it to tank i'm changing
for me oscars always have to be the biggest to be happy and plenty of water changes, i always prepare my water first in a 55gal for acouple days (declor,temp,airate) then add it to tank i'm changing