Hi Larry,
I really don't treat the heckels any different than my other wilds and domestics...I've always done this..... I think that theres a large amount of mystery surrounding the Heckels that lends itself to many myths.
On the soft acidic water....I don't think any discus "need" it to thrive..... I think clean, stable, and low bioload water is most important......but I do think that both domestic and wilds benefit from acidic soft water greatly in many ways.... Its only natural since thats what they evolved in... we certainly won't hurt a wild discus or heckel with it... but I have found my well water to work just fine for me. I'm sure thats not something that can be said for everyone as theres a tremendous range of waters out there....but here....well water is fine.
My water changes on the 75 gal tanks....are about 30% daily.. these tanks have between 7-9 heckels, and consist of 2-3 hydro 4 and 5's as well as a aquaclear 110 power filter....The tanks often house a couple wild bristlenose plecos... Of note... my kH here is less than 1 and so its not unusual for my pH to drift down over time...especially in the driftwood tanks....when this happens...I usually follow up with a large water change of 50-80%.
deworming...when I first get wilds in I treat them with prazi for tape worms and flukes.....Next I treat externally with quick cure for a week, last I treat as a bath with a broad spectrum dewormer.... Levamisole is my choice these days... but I have also used flubendazole when I have it. I will use panacur(fenbendazole) in food mixes....and if a wild comes in really looking bad...I sometimes will gavage( tube in ) panacur...
I generally deworm initially...follow up 2-3 weeks latter and then not again unless I suspect a problem.....
Behaviorally... I have found the young heckels to be a timid group, but once they start to grow and mature..they are every bit as much a "discus" as their non-heckel counterparts..... I also want to add that I have found they really do just as well with other wilds and domestics....
These are just my observations though, others I am sure will differ.
Thanks,
al