We have a 210 litre inbuilt tank, which we intend to be freshwater tropical. We are still buying the kit and setting things up, and haven't got as far as filling it with water, so fortunately have not added any fish yet.
DH read 'somewhere' that there is no need to pre-wash gravel, and that you can simply cycle the filter to clean it. So he has dumped all our unwashed gravel into the tank.
I can find no evidence of this at all - everywhere I look it says to wash gravel first.
What do I do? Is it possible to fill the tank and then clean with a gravel vacuum? Is there is any way to not have to take all the gravel out of the tank?