I wasn't sure whether to post this here, or under technical, but here goes anyway,
In my wifes 100l bumble bee goby tank we have replaced the internal eheim 2008? with a JBL 120 canister filter. i have both running in the tank now, when would it be safe for me to remove the internal filter. The external filter hadn't been in use for about a year, and i added some new ceramic noodles into it. I was thinking of 2 weeks, would that be long enough?