Euanthe sanderiana stops growing roots

[Sak_ikim_lol]

I love my Euanthe sanderiana young plant (12 inches leaf span). It´s the only vanda that it has not dropped any leaves since entered to my garden. Here in Merida I think it feels so nice as in the Philippines I have a lot of expectations with this plant. Sure is a vanda for my climate. The two top leaves are mine, I mean since it´s here under my care (you can see the older ones, normal, then smaller and after getting better) But is the only vanda that has a strange behavior: just start to grow root tips and stop after few days (well, maybe it doesn´t feel like in Mindanao ) All the other vandas have beautiful roots growing great now that we have monsoon-like rainings (like the Patchara behind). So I think three things:

1) It doesn´t like frequent fertilizings (you can see a brown leaf tip on the third leave left from bottom to top)
2) Mérida water quality. Here is hard-water*
3) Maybe it prefer shadier conditions so then more humidity so I must to relocate it.

*By the way I stopped watering my vandas daily from the top of the plant because the stains that the water leave on leaves. Just only once per week (and after I dry them leaf by leaf) and soon I will clean them more profoundly with a sponge.

The base of the plant is getting fat so it seems a new root will emerge from the main stem. And I want to keep it growing!!!

I really will appreciate your advices and suggestions.

THANKS!!!

Mario