kazimir

For a couple cuts, not really worth it, but I have a griffon in vienna if you need.

Bit of an old thread, but I have multiple tanks across from each other, so blacking out the room is not really an option. What I do instead is, setup the phone on a tripod preferably, then hold out a black blanket to block off the room light. If you have something near by, you can use squeeze clamps to secure one or both sides of the blanket. For a really large tank, go to a fabric shop and buy a few yards for a few dollars of a black non see through fabric.