Thats quite interesting. And now that you mention it i havw tested
My tapwater with my tds meter and it is between 210-230 give or take. I do use ro water but i have yet to get a di unit. After the ro though its coming out at about 7. That totally explains why the ppms are so high out here. Thanks for the info!

You might want to invest in good nitrate test kit if you don't already have one. Test both your tap water and the output of your RO system. I'd also test your stored RO water.

If you're adding nitrate directly to your tank, it could explain the dino explosion.

ETA: and I thought Calgary's TDS was high but I never test more than 140 on my meter

I don't have a good nitrate or nitrite test right now just a crappy nutrafin. I use salifert for the big 3 though. Would you suggest getting a salifert nitrate kit or a hanah checker? I am actually curious to know an accurate nitrate reading coming out of ro. The water must be bad though because iv only ran about 100-150 gallons of water through my ro and already the sediment filter is turning brown.

I didn't know Hanna had a nitrate checker. I'm lazy so if I could choose between a handheld checker and a test kit that relied on me matching a colour wheel I'd probably pick the hanna device lol.

I use the Red Sea nitrate test kit because it uses the same reagents as the Hach machine that I use at school (which really shouldn't go down the drain but there's not much you can do about that), but I'm gonna try and find me the hanna one now!

Im not posative hanah has a nitrate checker or not. I just thought i remembered seeing one.

I battled the battle a few years ago, almost threw in the towel, found a thread on RC but can't find it now, think it was Bertoni, as I recall, this is what I did.

No water changes (somehow feeds it)
Reduce flow (spreads it around)
Slowly increase ph to 11dkh and temp to 80F (irritates it)
Run a filter sock and change daily (collects it)
Skim wet (removes it)
Lights out for 4 days, 15 min ambient light daily to lightly feed the fish (kills it)
After the lights out, blow off the rocks, vacuum the substrate, and do a 20% water change. (cleans it up)
Bring the lights back on with reduced photo period, about 1/2 time
If any sign of recurrence then lights out 4 more days.
Slowly bring tank back to normal
My SG was 1.026 and I was running carbon and GFO

I know it sounds a little unorthodox but it worked for me.
All inhabitants survived OK.
It has never come back (knocking on wood)
Good luck!