After settling my betta into his new home I began noticing cracks and sealant problems (that weren't there before) so we had to rush to the pet store and get him a new aquarium.
As well as that, he decided that of all the plants he wanted to rest in it had to be the rigid, plastic, spikey lotus that I had all intention of removing anyway so that was taken out and thrown into plastic-plant hell (not literally... but why couldn't he have chosen his silk anubias-ish plant?!)! His filter was also swapped over to a fully cycled sponge filter as his hang-on-the-side one had too strong of an outflow and both baffle methods caused problems!
His new tank is two litres (half a gallon) less than what he had before, so it stands at 24 litres (6.3 gallons). I decorated it relatively similar to his old one (with a couple of preferred alterations) and am looking forward to getting a couple more plants for it.
Again, I apologize for the photo quality.