I have a crushed coral substrate . I think I am going to go with the 820s (2 of them) for the time being as I can not afford the tunze I want. If I would go the tunze I would go with a variable speed version with a controller, and right now can not afford that.
The reason I am looking is the 2 PH need to be replaced ad their flow is maybe half of what they used to be. even after cleaning The 802 has served me well.. used that in my FW setups and I can not remember when I got it.
Jim
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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, 3x MP40W, 2X Koralia 4's Wavemaker
Lighting: 5ft Hamilton Belize Sun (2x250W MH, Blue LEDs) Vertex Calcium Reactor 2x Deltec Pellet Reactors
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