I agree, that is way to aggressive.
You don't have many pellets in there, but it is recommended that only the top layer moves somewhat aggresively, while the rest tumbles quite slowly/gently, so slowly that they don't move much, but pressure will build within it and you will see area turn over with time, releasing the mulm/bacteria.
This is the problem with the pellets, many failures, due to the fact of the pellets not being used properly. I myself am one of them that used incorrectly in the past.
I can tell you this, if used properly, they do work... I am seeing great results with them overall.
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Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite)
Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 2x MP40W, 2X Koralia 4's Wavemaker
Lighting: 5ft Hamilton Belize Sun (2x250W MH, 2X80W T5HO)
Type of Aquarium: mixed reef (SPS & LPS) with fish
Dosing: Mg, Ca, Alk
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