How much does TDS actually matter

So I was going through yesterday doing my routine checks for my GH, KH, and PH since this tank hasn’t been setup very long(75 gallon Mbuna only tank). I use Malawi buffer at water changes since my tap water has a very low KH and PH of around 7.4. So anyways my GH is 16 and my KH is 8 and PH is holding steady at 8.2. All the fish seem thrilled with the tank and the environment I created, nobody looks sick, and all of the fish have great color and showing breeding behavior. BUT I checked my TDS and I’m at like 700 ppm! Is this a concern? My tank has about 100lbs (or maybe more) of seiryu stone and holey rock, so I know I would have increases in tds because of how much stone I have in there but 700 seems a bit excessive. My tap water tds comes out at about 175 ppm. Thanks in advance!