I have an extra 20g long on hand that I plan to use to house some salvini fry and was wondering if it would be advisable to filter it with a Penguin 170 HOB filter (with a sponge over the intake)?
The 55g parent tank is filtered by an Eheim 2217 and two of these HOB filters. I was thinking I could just take one of the already cycled filters and put it on the fry tank... or would this be too much water movement?