There have been MANY threads where people have debated yes or no on a rocked pond. None that I have seen where "mostly ppl voted for no rock" nor where they shared "terrible experiences". The article you linked is ineffective for two reasons:
1. As soon as you say "bottom drain" you eliminate the question. If you build a pond with a bottom drain, then you don't want to put any kind of rock or gravel on the bottom, obviously. But many many MANY ponds are built without a drain so the rock won't interfere with how the pond functions.
2. The article mentions rock trapping leaves and debris - when people talk about rock in the bottom of their pond, they aren't talking about big boulders on the floor of the pond. You add a shallow layer of gravel to the bottom which has the ability to trap ZERO leaves. I get in my pond all the time and stir up the gravel with my feet - no debris.
The other thing you ignore is that many pond builders believe that having rock in a pond is actually beneficial, apart from the aesthetics (which are a personal choice - some people like the look, others don't). The addition of rock and gravel in the pond adds surface area which allows aerobic bacteria to have additional surface to colonize and work to help keep your pond cleaner.
Sorry - don't want to hijack the thread, but I am a big proponent of sharing facts rather than myths and giving people the information they need to make their own choices. Repeating things over and over and over again can give them an air of credibility that they don't deserve. The science of pondkeeping has moved past the days when "rocks or no rocks" was a question with one single correct answer. If you go on a koi pond forum, you will find a consensus there that says absolutely no rocks in a pond - but again, they are building a whole different kind of pond with a whole different purpose in mind than your backyard garden eco-pond.
thnx yes ma'am i get ur intention i read ur valuable advise now i want to say some points too , my english is not that good so in dictionary i rechecked rock means larger piece , it doesnot mean gravel , when people say rock they mean some thing bigger then gravel like stones or pebbles or bigger river rocks in clips or articles , gravel means smaller pieces
but even if gravel pebbles or stones they r not recommended either for these reasons mainly what i researched learnt by others and experienced , it gets black mucky and traps gasses bad bacteria... rots in bottom which is harmful and hard to clean if its small , its said that any irregular corners should b avoid as it can catch debris , if for cosmetic purpose , it rarely stays same , it gets covered with algae if u have good sun or with dust , they have some other issues too thats why true koi pond should not have rocks as standard i heard from mayyer too
it doesnot have much good bacteria effective for bio filter since its deep down has no oxygen or flow more then a feet or so , unless u create under gravel flow , i agree every one has there own choices circumstances i just saw ur pond i think its stream type water flowing from one end to another may b u have good strong flow and filtration or shallower pond that keeps it clean .
usualy this happens in majority of cases most of the vids u will see they add rocks for decorating but ask them after few months its hard to maintain but rocks can b added if with wisdom and keeping in mind ur circumstances and by testing how it goes , i my self have rocks and gravel but i have learnt from experience at which place and height is best avoid deep bottom and where water has no flow . just telling cons pros doesnt mean some thing is rite or wrong but in most cases how it is
u can read ppls experiences more and articles of experts and decide
Rocks in the bottom of a pond | Garden Pond Forums
https://www.gardenpondforum.com/threads/rocks-in-the-bottom-of-a-pond.4127/
Gravel & rock can create a stagnation zone in your pond
http://watergarden.com/pages/gravel-rock.html
The effects of River rock on the bottom of pond.
http://forums2.gardenweb.com/discussions/1598049/the-effects-of-river-rock-on-the-bottom-of-pond
Rocks - Never put rocks in your pond..Aqua Art Pond Supplies
http://www.aquaart.com/Solutions-Rocks.html
Why you should not put rocks in the bottom of your pond. - YouTube