Yes, just a rough straight inch add-up puts you a bit overstocked but because most of the fish are small-bodied I'd say it's fairly borderline. A lot depends on your experience. If you are brand new to fishkeeping (this is a beginners section so we always have to consider that possibility) then you won't yet know your own ability to maintain commitment to the sometimes excruciatingly boring tasks of year to year maintenance on a weekly basis.
The problem for beginners is that they are by definition enthusiastic usually, but only have this with which to judge how they will do on the maintenance regimens, not a true retrospective of "how I actually did!" But if you already know that you are reliable at puttering with these things each weekend etc. then being a bit overstocked usually goes ok. It does entail added risk during power outages, so that's a good thing to keep in mind. On the other hand, if you are a true beginner then it is just so much better to remain "inch guidelined" or understocked for the first two years. This is because those first two years will play a much more powerful role in establishing your "feel" for a healthy tank, allowing you to better judge when things are creeping away from normal for the rest of your years in the hobby.
As long as you are at least at a 4 or 5x turnover rate with your filter flow or higher you will be fine. The planted tank folks (it's a special hobby) often run up at 10x or higher but many find this then challanges you in creating an ok environment for the fish to actually swim in. I can't picture an endler tank with such high flow. OM47 (member oldman47) keeps endlers and I think he has pointed out in the past that you certainly don't need especially high flows with them. Salt is not recommended.
~~waterdrop~~
