Please refrain from name-calling and ridiculing. Calling appeals to scientific research "nonsense" and accusing people of OCD is not called for. Many reasons for water changing have been cited besides people wanting their tanks unnaturally clean. Disagreeing is OK, but please keep the language civil. Thank you.
oi? ridiculing? naaa...this thread was mostly about a copper pipe until it was highjacked about people's ideas on how he should do water changes...
and people keep bringing papers to back up their claims...
something I've always liked is stability...and according to DR. White a researcher for brisbane university fish like acidic water
https://www.abc.net.au/science/articles/2010/03/11/2841714.htm
according to blogger Eileen...tap water is no good for fish..we should ALL start using RO and distilled water and fix our water parameters accordingly
http://blogs.thatpetplace.com/thatfishblog/2010/11/24/finding-the-right-water-for-your-aquarium/
and according to the "web MD" (I actually found a titled internet doctor! xD)
big water changes are bad for fish and you run the risk of resetting the nitrogen cycle
https://pets.webmd.com/how-to-change-fish-tank-water and should be 10-15% for small tanks and 20% for larger ones
I'm sure I can just go round and round finding stuff to back up anything right or wrong..
point being...OP does 21%/weekly which is accepted by most as a decent water change right?
so what's all this fuss about his water changes when he was literally asking about copper and it's effects on fish
people just got focused that he does 3%/daily and all the reasons why it's good or bad instead of the actual OPs question
-------> breeders do it with drip systems at around 20%/week just like the OP <-------
who do I trust? a joe schmoe like Dean(co-op) or vice which are literally 2 people that live with their fish and have probably tested a million ways of doing things
for better end results (more fry), without phds and that rely on the amount of fish produced to make money?
or a phd that couldn't even breed fish and had to pay breeders to come show him how to do it...but has a youtube channel? and so people use his name to "back up their stuff?"
when they don't even bother to know he breeds the very fish he claims to "save" for profit in Brazil to big aquariums...
PhD - Leandro Sousa -
https://www.youtube.com/c/LeandroSousa_IctioXingu
or them internet PhD's to change my water at 90%?