That is exactly the way I do my cb70 Vision racks. Two of the 50' or 52' cables are what you will need just to keep the back 1/3 to 1/2 of the tub heated.
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JEM from sunny AZ.

2.25 Normals
5.9 Pastels
3.6 Normal Spiders
1.1 Spiders 100% het Ghost(thanks Mark Petros)
0.2 Spiders 66% het Ghost
1.3 Orange/Butterscotch Ghosts(BallPython777 Mark Petros)
0.6 100% het Orange Ghost
0.3 66% het Orange Ghost
0.1 Pastel Ghost
1.0 Citrus Ghost
0.1 Super Pastel 100% het Ghost
2.0 Albinos
1.0 Caramel Albino
0.4 100% het for Albino
0.3 66% het for Albino
0.1 50% het for Albino
0.1 Yellow Bellies
1.2 100% het for Clowns
1.2 Cinnamons
1.2 100% het for Pied
0.3 66% het for Pied
1.3 Mojaves
1.1 Beautiful Black Pastels(thanks Gulf Coast Reptiles)
1.1 BumbleBees(thanks for the AWESOME Bees Marc Bailey)
1.0 Super Pastel
0.1 Chocolates(Thanks Brandon of Priceless Pythons)
1.1 Lessers
2.1 Fire's(Thanks Brandon of Priceless Pythons)
1.2 High White Calico's(Thanks Brent from BRB)
1.1 SpotNoses(Thanks Brandon of Priceless Pythons)
1.1 Enchi's
1.0 Pinstripe
0.1 Lemon Blast
1.0 Vanilla Ghost(Thanks again GCR for all the great snakes)
0.0.1 Vietnamese Blue Beauty

17 Tarantulas
Last but most Important 2.2 Children

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