Lol, seriously ppl use an extra heater to heat new water?!

Never done that. Can't imagine not using de-chlorinator in the tanks but I also suspect there are far more chemicals in our tap water now than there was way back (#41#### those water companies) and maybe that is partially why fish keeping was successful. I also suspect that ignorance sometimes worked favourably as it weeded out weaker fish and left stronger, hardier fish which were bred from. Some fish nowadays are treating with so much care that the slightest wrong move could prove fatal.....I have to consider that if a fish is that sensetive surely it has been caused by over-breeding or in-breeding. If not, then it should be left in it's natural habitat and not tortured in unknowing aquarists aquariums. Maybe we should be expected to take exams for some fish and reach 'levels' before being allowed to keep certain fish....bit like a computer game!
Seriosuly though, I agree that the internet has become a place full of information, allowing modern fish-keepers access to knowledge previously reserved for specialists. It has also led to plenty of conflicting information, some of which one group of aquarists swear by and will flame you for thinking otherwise, whilst another group will flame you for not believing something entirely different!
Blimey. I reckon I could rant on forever, lol.

Find the happy medium, know your fish, only buy from someone you trust and filter with whatever system you prefer. If it works, who cares if someone else hates that system?!
Ok, I'll shut up now.
P.