Cheers for the replies people - i have disturbed it and 90% of it has now gone.
I've got water treatment chemical that I'm putting in for the next 3 days to help the water and then my first fish next week, probably zebra danios
Hi all,
Got myself a new set up today, I've had tanks in the past but bought a new one today for the first time in over 10 years!
Anyway, I've tried fine black gravel as my substrate and I've got lots of air bubbles on it and small patches of it floating on the top.
I did rinse it briefly but...