I agree with Rob. That tank is far too small for that fish. As he said, they get to 3ft easy but can go up to 5ft/6ft in which it would need a tank over double that size. I do feel that the Redtailed Cat is better left in the wild. Only a very small minority of people have the size tanks/ponds they need, so when they get bigger they go from home to home, and eventually living in a tank far too small for them.

But getting back on topic, that tank is quite big . Wonder how much he would tank for it.

There was also someone selling a nice 8x3x2 with stand and sump for the bargain of £250.

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8' x 2' x 2' - Marine Reef.
6' x 2' x 18" - Wild Caught Zaire 'Moba' Frontosa
4' x 2' x 20" - Malawi
4' x 22" x 18" - Malawi + Victoria
4' x 18" x 18" - Breeding Cuban Cichlids.
Trigon 190 - Male Paratilapia Polleni
20" x 20" x 20" - Marine
30" x 1' x 1' - Hospital Tank
2' x 1' x 1' - Tropical

and

7x - 1' and 2' cichlid fry tanks