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Anyone knows the actual measurements of Do!Aqua Violet Glass Inflow Pipe VV-2?

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On the AFA it says: "Specifications: Violet Glass-(Inflow) VV-1/13mm: for 45-60cm standard aquarium AND Violet Glass-(Inflow) VV-2/13mm: for 90cm standard aquarium".

But does anyone know how much the VV2 actually measures from the curve to the bottom of the inflow (the section that goes in the water)? Before I ordered the VV-1 (measures 9" from the curve) for my 12gl Fluval Edge and it sat pretty high on the tank. There could have definitely been dead spots, where the water didn't circulate. Maybe I should go for the VV-2 but would anyone know it's measurements? Thank you