I have been told shrimp will probably died in high No3 level. What do you guys think about that?

I'm inclined to agree with that notion. More importantly they tend to thrive in a low No3 enviornment ! I REALLY like my shrimp, and see no point in risking their health. They work, and clean relentlessly, and they're fascinating little buggers.

That said you can always pick up some grass shrimp or the like to verify your shrimp keeping skills before you commit to any overly sensitive or "Expensive" varieties. Personally I feel they're all pretty resilient, and a planted community is kinda half baked without them. My personal favorites are cherry shrimp, red nosed shrimp, and Amanos, but really I like them all !

A small community of Bumble Bee shrimp poking their heads out of the Glossostigma like Wacka Moles IS Pretty Hysterical ! HTH Prof M

They did die(amano shrimp) at 120-160ppm NO3++ levels.

I'd rather folks say: shrimp do not like high NH4, that's where most of the toxicity issues arise. Few have ever added specifically NO3 from an inorganic salt to verify the direct NO3 impact, they just measure the left over fish food/waste etc that starts off as what? Organic Nitrogen, then processed by fish using O2, then organic N again, then bacteria munch and oxidize more till we get NH4..........now we have another group of bacteria that munch of NH4=> NO2 then another bacterial set NO2=> NO3.

That's a bit different than saying inorganic NO3 from KNO3.
I can kill fish with zero ppm of NO3 with that method.....

But folks want to make statements about NO3 in general and then apply them to KNO3 dosing.

That's very dangerous and may support myths without testing and verifying if they are right or not.

So you add KNO3 and see.
I did.

Then you go back and try to add 120ppm of NO3 via that other pathway


Lots of death there, never made it to NO3, all the shrimp died before the nitrogen was made into NO3...........

Regards,
Tom Barr

Yer gonna sail right off the edge of the petri dish... Repent Now ! Perform 3 acts of contrition, and scrub out the autoclave !!! LOL

so i might be ok cause my NO3 is at a maximum of 30 to 50 ppm

Well, whatever it is, it's not NO3.............

So you can try another cause havign ruled that one out.
NH4 and low O2 are my best pics.

Regards,
Tom Barr