Java fern is getting brown at tips

[FrezhFinz]

Hello everyone! This right here is my 29 Gallon tank that I have a couple of blood parrots a fire mouth cichlid and a electric blue jack Dempsey with albino pleco I have a lot of Amazon swords about three or four pots of them in there with two Java fern and one Anubias on the tips of the java fern there are brown and I was wondering if I there aren’t getting sufficient minerals in roots from my flourish tabs. This tank was cycled properly and fish have been here for about three months any tips or tricks and this is just a temporary tank for all of these guys eventually moving them into a 75 gallon. 

[TheSwissAquarist]

Have you thought about adding Easy Root Tabs?

If you're worried that they aren't getting sufficient minerals maybe add some crushed coral into the filter.