I always do cold water changes. I try not to let my tank temps drop more then 3 or so degrees but the fish love it. I think it gives them a refreshing boost it just makes them feel good. It is also helpful to cause a spawn. In some cases.
[video=youtube;SGndKpJQxEY]https://www.youtube.com/watch?v=SGndKpJQxEY[/video]
This is a great video that gives some very good reasons to do cold water changes.
I totally agree with your points Ryan. It is therefore better to shoot for 10ppm being the "high" nitrate level, but for monster keepers to do that, often requires more than one single approach to water keeping.I was called out once here for suggesting nitrates over 20ppm were bad for your fish long-term, but I still stand by that. 40ppm is high. That's the kind of stuff that gives fish like Geos and oscars HITH, and stunts discus growth. I keep most of my tanks below 10ppm where possible. Nitrates are just one thing we can test for, but there are plenty of dissolved organics in the water that go along with those. Think of all the decomposing waste, food, etc. that dissolves into the water in between changes. If your nitrates are rising, what else is? Try doing larger and/or more frequent changes and see if his color improves overall. If so, there's your answer.
Use pothos and/or Purigen, both remove nitrates.Does anybody have an easy solutions for tap with high nitrates to begin with? Also what are the affect of nitrates on humans?
No offense, but that seems different than: "parameters are always good, nitrates rarely go above 40... "40 was just a figure from last week, i done a filterclean with tap water and big water change then had a very cloudy bacterial bloom so im guessing ammonia spike then the nitrite then nitrate bacteria bloomed then died off as the ammonia leveled out? it tested pretty well on the thurday, waterchanged last sunday and today... i will test next saturday before the waterchange... that was a strip reading too as i havent got a drip test for nitrate... the drip tests showed lowest ammonia reading and 0 nitrite tho...