But if you study fish and know that x fish can live in the same conditions as fish (MY STOCK AT THIS POINT IN TIME), what chap A has to say all of a sudden becomes very relevant very quickly. Loads of different fish share similar qualities, illness and water parameters simply put.
(Like we both agree, learn what you are doing to the best of your ability) I think for some people a tank is a fad or impulse decision while out at the garden centre or to please the kids etc. I inherited a tank from a guy who didn't realise the workload who got it for his kids, he couldn't be bothered so I swapped him a bottle of vodka for a 36x15x15 with stand/hood and a Fluval 205 plus some equipment. Two happy people emerged from that deal. (Vodka was a good quality grey goose @ £36 bottle) now to me that's a right bargain, the filter alone at sale price was £60 and a fortnight old, the system itself was 2years old, with an in tank Fluval 2+
My brother is a guitarist, he's been playing now for 20 odd years, he is GOOD!
https://www.flickr.com/photos/92891884@N04/8458185765/
My bros insane guitar collection. (The bass is missing, no studio can be seen neither can the xylophone? Or the keyboards)
Check this out! He is a proper musician, like I know fish and a few other things he knows music. (I do own a semi acoustic ibanez, black with white marketry, mother of pearl or abalone inserts, it's very nice)