They sell a base rock I believe its called maze rock but its nice because its very easy to aquascape and holds without tumbling down and since its not seeded no hitchhikers or worrying about it drying out untill you have free time also its alot cheeper than live rock. But your tank looks very neat and clean I think. Mine is a jungle lol sometimes its nice to see a simple clean looking tank.
Looks great. Do I see three btas now? Did it split again?
Yes and there are actually 4