Surfing / Water in ears affect Meniere's?

Hello -

I'm 42 and have had Meniere's disease for almost ten years now. For the first five years, after going on a supplement regime, I went into complete remission. Then my family and I moved to Costa Rica to run a surf school. While there, I stopped taking supplements religiously, developed GI issues from heat, developed gluten sensitivity, and of course all this led to flare ups. We have since left Costa Rica and moved to New Zealand. I am much better now but still get ringing in the ears, and whenever I get stressed, pressure builds in my nose and ears, which leads to some wobbleness.

One other thing I noticed is that since i moved to Costa Rica and to New Zealand, I've been surfing a fair amount and without ear plugs. I remember someone once told me that it was important to keep water out of the ears if you suffer from Meniere's. So, I wonder if this would have contributed, especially the cold water in New Zealand. Could that be an issue? Do any of you wear ear plugs in the shower as well?

Thanks and appreciate any feedback. Also, I was born profoundly deaf and what you call a meningitis baby - so assume my meneieres is from that.