OK, I PM'ed Richard Durso, and he thought the level variation and gurgling was due to the end in the sump being submerged too deep. So I temporarily added an elbow to the end and had it mostly below the water level in the sump, just a little above to stop the bubbling. And voila, no gurgling at all for the past few hours, and the level appears to remain much more steady.
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Looking for perfection in an imperfect world.
Until one has loved an animal, a part of one's soul remains unawakened.
~ Anatole France (1844-1924)
Current Tank Info: Dusty 110g, 55g & 29g tanks
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