I was thinking that the transient nature of the lfs stock would explain why their fish don't have any visible effects from high nitrate, but the breeding stock for the arrow farm unless housed under different conditions would be a different story.i did test 3 LFS water with API Test kit..i took a sample and bring it home.. ammonia really close to 0 (there are some presents but less than 0.25ppm im 99% sure), nitrite 0 , nitrate high 60-80ppm.. which is pretty close with my water parameters in the tank