I do not recall ever having an issue with clay tile and an acidic drain cleaner. 

Power washing and some type of acid wash plus power washing did not remove the black coloration from the otherwise standard concrete color floor.

Stock brokers use the acid test-quick ratios, earnings per share and ratios based on a snapshot in time of an investment.

The inspector said it had a higher gloss which would make acid etching difficult so I'm trying to decide if I should just try and seal it with some sort of paint/sealant, and then carpet.

It just has enough accumulation of sulfuric acid to cause issues in an enclosed space. 

A quick acid test, if you will?

The water could be acidic , you could have some electrolosis .  

If it's on concrete I like acid stained floorsIt's relatively easy to do and cheaper...sorry, less expensive... than vinyl, or laminate Looks amazing Very popular and desirable in my area.Seems like a good selling point and I see more and more new constructions going with it all the time If you're renting it's perfect 1 time investment of time and labor and it's done It's my go to when possible There's a ton of DIY resources on YouTube that I've used

So i figured go for a better class of asset while i am still new and a little uncertain of macro factors (to avoid heartache/acidity/deep paper loss in the short term).

It will still cash flow nicely becuase tenants will pay own heat afterward, but still, the 50% rule is a quick "acid test".