Advice? What filtration on QT?

I dont ever put in LR. 1. it can absorb medications if you have to treat the fish. 2. it gives parasites a place to hide and grow.

To me, it depends on size and intent. I recommenced qt everything. If it is wet, QT it. So many pests and parasites can come in on fish, corals, even snails & their shells.

Airstones, Spong filters, small hang on back filter. Ammonia alert badge, water changes, prime are good tools.

 

+1 to sponge filters they are cheap and work good for what it is

 

Great question!

I currently use an old 12G cube with its internal filtration. In the past I used a 20G with no filtration and rely on weekly water changes.

Typically, the volume of water is substantial compared to the single (typically) fish that's in the tank and if you need to medicate you may kill any beneficial in the filters.

In the 12G I change 1 - 2 gallons per week using water from my display tank and have never had an issue.

Hope this helps!

-Eric