My stocking plan is to go a little on the over stocked side, so I don't really wanna add anything which is gonna change my tank water too much, as I plan to do more water changes than you might normally do and don't wanna be battling with pH shock and the like. The pH and softness will be ideal for my fish, it's just a case of getting the bacteria happy. Tbh, I thought I'd be in my qualifying week by now.
There is a possible alternative. I have an old filter I was using before, the cartridges from which are currently in my fluval 205 right now. If my tank really wasn't ready for fish, I reckon the old filter could probably keep the cories going in a quarantine tank until my main tank is 100% ready. That's if the LFS wasn't willing to hold them any longer.
We'll see what happens though. A lot could change in the next few days.