No carbon if you are doing a treatment, carbon removes copper and other chems. If it is a simple observation QT then carbon is fine. Just remember to remove it if you ever do a treatment of any kind.
There should NOT be any inverts in the QT/hospital tank. If you need a place to do a treatment the copper will kill them all and things will go very badly.
My comment on crabs and sails being fine alone is in the instance that you need to remove your fish from a main tank to a QT and have no fish in the main display for a while.
Adding LR is up to you... I would NOT put LR in a QT tank because treating with copper will kill the bacteria and critters on it just like the inverts. Possible bad results such as ammonia spikes. Plus LR absorbs copper if you ever treat... a LR with copper absorbed into it can never be used for a tank with inverts.
I have a very shallow sand bed in mine only because I had some left and tossed it in... in some places it doesn't even fully cover the bottom... in the ends and corners it's maybe an inch deep. I keep pvc pipe pieces, elbows, tees as hiding places for the fish to be comfy.
Mine is on my kitchen counter tucked in a corner with cabinets over the top... it's not a show piece. It serves it's function. It's convenient to monitor any fish that might be in there.
As far as fish... I have a single yellowtail damsel that is relegated to my QT (because I don't like it) to keep the bio functional. A single, very small fish or two would be OK... but remember that it/they may not fare well if you eventually do repeated copper treatments on incoming fishes.
A QT/Hospital is a very utilitarian set up. Adding livestock complicates it's function quickly to the point that it wouldn't be very functional at all.
If you want a cute little nano tank on your counter with crabs, snails, shrimp, or a couple of little fishes, great. But it's not really a QT.
If you want to have that IMO you need to run two hob Bio filters and have a clean empty extra tank available to move one of the filters to to serve as a plain old QT whenever there is an incoming fish. Or that can be set up quickly in case of a problem with a current fish.
There should NOT be any inverts in the QT/hospital tank. If you need a place to do a treatment the copper will kill them all and things will go very badly.
My comment on crabs and sails being fine alone is in the instance that you need to remove your fish from a main tank to a QT and have no fish in the main display for a while.
Adding LR is up to you... I would NOT put LR in a QT tank because treating with copper will kill the bacteria and critters on it just like the inverts. Possible bad results such as ammonia spikes. Plus LR absorbs copper if you ever treat... a LR with copper absorbed into it can never be used for a tank with inverts.
I have a very shallow sand bed in mine only because I had some left and tossed it in... in some places it doesn't even fully cover the bottom... in the ends and corners it's maybe an inch deep. I keep pvc pipe pieces, elbows, tees as hiding places for the fish to be comfy.
Mine is on my kitchen counter tucked in a corner with cabinets over the top... it's not a show piece. It serves it's function. It's convenient to monitor any fish that might be in there.
As far as fish... I have a single yellowtail damsel that is relegated to my QT (because I don't like it) to keep the bio functional. A single, very small fish or two would be OK... but remember that it/they may not fare well if you eventually do repeated copper treatments on incoming fishes.
A QT/Hospital is a very utilitarian set up. Adding livestock complicates it's function quickly to the point that it wouldn't be very functional at all.
If you want a cute little nano tank on your counter with crabs, snails, shrimp, or a couple of little fishes, great. But it's not really a QT.
If you want to have that IMO you need to run two hob Bio filters and have a clean empty extra tank available to move one of the filters to to serve as a plain old QT whenever there is an incoming fish. Or that can be set up quickly in case of a problem with a current fish.
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