No one has said it so far:
Do not just move the sand. Either toss it and start with fresh sand OR thoroughly rinse the sand before putting back in to the tank. There's years of gunk trapped in the sand. By moving and jostling it, it'll cause a huge spike in nutrients and issue.
Do not just move the sand. Either toss it and start with fresh sand OR thoroughly rinse the sand before putting back in to the tank. There's years of gunk trapped in the sand. By moving and jostling it, it'll cause a huge spike in nutrients and issue.
