I only have 4 silk plants in there currently, that's it. Not enough room for Bogwood and as I am still very new to fish keeping I don't think real plants are an option for me at the moment. (everything about my tank is in my signature!)
Actually, live plants are still an option
Anubias and Java fern can't be grown with a substrate so would be ok if you just sat them on the media. Java moss can also be wrapped around the central column.. all three of those plants are basically impossible to kill! Worth considering
Hopefully your pH will settle out once the tank matures.. but I can't see anything which could be affecting it now..
p.s. I would advise you against cherry barbs because they should be kept in schools of 6+ and should have at least a 2 ft tank.. more shrimp would also look cool!