Hey everyone!
i have been on vacation for the last 2 weeks at my parents house in colorado. (i live in chicago) my neighbor has called me a few minutes ago and he's telling me there is lots of brownish gunk on the aquarium walls. he says that it comes off easily, but it comes back after 2-3 days. what could be the cause of this? this has never happened before to me.
all the water parameters are normal, everything is normal, fish are healthy.
there is also build-up on the rocks.
i have been on vacation for the last 2 weeks at my parents house in colorado. (i live in chicago) my neighbor has called me a few minutes ago and he's telling me there is lots of brownish gunk on the aquarium walls. he says that it comes off easily, but it comes back after 2-3 days. what could be the cause of this? this has never happened before to me.
all the water parameters are normal, everything is normal, fish are healthy.
there is also build-up on the rocks.