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#1
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![]() They are both the same, you just take off the guard at the bottom and it looks like a Tunze.
I think the 620 is smaller than the 820. Not 100% sure of that though.
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32"x32"x20" Cube-ish tank |
#2
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![]() I believe the 620 is slightly smaller but they are way under powered. (especially in a 4 foot tank) You would be much happier with the 820s or 1100s.
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