i only have about a 3in gap against wall on the back lol and its the only place the tank fits so again, not possible...i have looked at my options and unfortunately it will need to be an in tank skimmer...

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Fish
5ft fish only marine tank
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Reptiles
0.1 Kahl strain albino Boa Constrictor
1.0 salmon hypo het kahl strain albino Boa constrictor
0.1 common boa constrictor
0.1 albino granite burmese python
1.0 tiger reticulated python
1.2 eastern indigo snakes
1.1 brazilian rainbow boas
1.1 kenyan sand boas
1.1 albino bull snakes
0.1 wild type bull snake
1.1 crimson corns
0.1 royal python
1.0 blue tongued skink
0.1 tiger salamander