Friend, I wasn't saying that you double posted or anything like that
I'm assuming this is the API Reef Master test kits? If so, they don't get a lot of love here on R2R, but in my experience they are not really that bad. In general look for trends, like nitrates went up or down over time, and don't get focused on hard numbers. Pretty much all of the hobby-level kits we have are just that; hobby level, not laboratory grade.
This is a really good question, and personally I'd say; possibly, yes
Soft corals do not need to build calcium carbonate skeletons, but like all corals I think they benefit from primarily a stable environment, and secondarily parameters that at least meet the minimum for any coral. If accurate, your parameters do seem low for any coral.
Can you bring a sample of water to you local fish store and ask them to test it, provided they don't also use API kits?
After water quality its flow. Flow is really important to coral health
Friend, I don't claim to be an expert in reefing or anything, but I personally wouldn't add anything until you know for sure what your parameters are.
I'll also ask, what salt mix are you using?