No UGF plates here, but my tank is very deep, 77gal, and even though my Eheim Pro II 2026 kicks ass, even it has trouble getting any strong current to the very bottom of the tank. I'm certain I have deadspots around the tank. And I have a very deep gravel bed, so there are possibilities for waste and/or Ammonia to be settling down there. I'll stir up my gravel and see if I get the same effect, an increase of Ammonia. I'm also going to start trying to assemble an Under Gravel Jet to help with lower level tank circulation. It's described here in this article: http://cichlid-forum.com/articles/ug_jets.php
As you mentioned before though Adamj because my tank is quite large, that is probably just compounding the problems I'm having with my cycle.
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5gal : Planted and cycling.
10gal : 2 Harlequin Rasbora's, 3 White Cloud Minnows, 1 Common Pleco, 2 Fathead Minnows, assorted plants
34gal : 6 Black Skirt Tetra's, 4 Tiger Barbs(3 Albino), 4 Red-tailed Green Cory's, 3 Silver Mollies, 1 Bristlenose Pleco, 1 Bumblebee Catfish, 1 Crayfish, assorted plants
77gal : Brackish tank, 3 Colombian Sharks, 5 Knight Gobies, 2 Archerfish |