The white paper has helped me for both my tanks, as well as making sure the room my second tank is in has another light on. so I don't have to cover all four sides in white paper, which would ruin the reason to keep fish if you can't see them. In a dark room with the light in the hood on will make them see a reflection, so I always keep my bedside light on as well to remove the chance of reflection.
As for the coffee mug, so long as it hasn't been washed in a long time so there's no chance of soap residue it should be fine.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Betta Fish Forum
1.8M posts
106K members
Since 2006
A forum community dedicated to Betta fish owners and enthusiasts. Come join the discussion about breeds, health, behavior, tanks, care, classifieds, and more!