I totally agree with the odd numbers and it has been playing on my mind when I do the water change in a bit I'm going to try and squeeze a third in at the back in the middle will have to get the hammer out though as there the smallest 2 in there and the AG guys did say it will be a different texture and colour on the inside so it's a bit of a risk to smash it up lol I did say you could have some of the ones I'd chosen lol