Lime green plants!! :(

[IntrepidSavage]

ahh man, destroyed by RT! ahaha... alright I'll answer best i can inline:

First and most important...what are you using to test your ingoing ph, and the runoff ph?
You mention you're in a medium intended for roses? Roses are acid-loving so I sincerely doubt it's ph is buffered that high.

I'm using the pH drops test with the label where you compare the color. I've tested it on all kinds of water, with acid, with base, etc. I think i can read the color correctly.. i dunno, maybe dissolved solids is throwing the color off a bit..

Does it have any perlite in it? A couple of the pots look like you stuck a plant in a cow-pie.

HAHA the cow-pie effect is from the compost tea i made last time. hey, i'm a scientist, i like experiments what can i say. getting rid of the top cow-pie layer anyway.

You adjust all your ingoing water to 5.0ph? Geez...that's gotta be 1/4 cup of cider per gallon of water, isn't it? This is likely the reason they're yellowing. Adjust your ingoing water ph to 6.8ph, and give 'em a couple of days to see if that helped.

It's not that much cider vinegar.. ya i probably over-did it trying to lower the pH, will low pH make the plants all around yellow like that?

I'm almost afraid to ask...but what did you "solve"?

lol.. i found soil with a label declaring for the world that it is pH 6.3. Pretty sure the mix i'm using is higher pH

Putting anything that has not been composted into your pots, is a great way to promote rotting soil. (coffee grounds, citrus peels...) Shit like that will rot. You've heard of beneficial bacteria...? Well conversely there are damaging bacteria, too. And egg shells are not a good source of calcium. (it's not in a form the plants can uptake)
All that stuff is great in the compost pile, but bad in pots.

ok, no raw materials.. not sure where the eggshell advice came from, i didnt mention it and am not using it..

Likely a good idea to learn to grow before you try experimenting with your own soil mixes. I've never used coco, so have no comment other than it runs at a lower ph, and is notorious for salt (nutrients) build-up. Peat based mediums are somewhat cheap, fairly forgiving and easy to find. If you have the experience to dial-in a working soil...then have at it. But you're setting yourself up for failure if you don't know what you're doing.

for the last time, i live in a third world tropical country with a similar climate to puerto rico but probably less access to "things". I am extremely limited in where i can find this shit so i'm doing the best with what i've got. Too bad u can't help with coco, ur right i'm heading for disaster with all this tweaking!

So, i'm going to repot the three in some mix of coco and soil, hopefully the plants turn around! anyone with experience in coco mixes, lemme know..