tank been filled with fish for over a week now, used gravel etc from established tank, its a 3ft with an internal filter
took apart last night for a quick peep and the filter is covered in a light brownish sludge?
i was only checking it as was told once established the filter should be blackish
took apart last night for a quick peep and the filter is covered in a light brownish sludge?
i was only checking it as was told once established the filter should be blackish