I have heard good things about her!And even the good ones tend to not bother match the fish to their water hardness. But then they are often breeders who sell them on, some of them rehome a tank so they film the rescaping and restocking and so on. Rachel O'Leary seems to know her stuff mostly, she does lecture tours for fish clubs too. She says she only started youtube after Joey diy or someone suggested it, previously her online presence was on forums. For all I know this one.