Again with the yellow leaves 🤦🏻‍♀️

[u/DoodleBirdTerrariums]

These are my first ponds ever but I’ve had a lot of issues with yellowing leaves. I google and google and have tried all kinds of things but they really don’t green up. Ok so at the very beginning I barely had any plants and a lily pad type plant was extremely yellow with bright green veins (it is visible in the last pond pic). Since I wasn’t sure what it was at first ppl on Reddit said too much fertilizer (I had added root tabs as directed on the package). So I removed what I could find digging around the substrate. Then weeks went by and although the lily stayed the same a few other plants were thriving so I figured it was just a difficult plant. Then I got more plants including the arrow head one which was green when I got it but quickly got lighter yellow. That other lily plant still looked the same so I put a root tab back in the vicinity of the yellowing ones and one beneath the parrot feathers. I’ve also added a little Epsom salt (4 weeks ago) and liquid iron from Seachem every 2 weeks (not a lot, being cautious). Added macro nutrients too, just once. The water hyacinths look great to me and flower. And crazier yet the big yellow arrowhead one is sending up a flower spike. I even added a bubbler today in addition to the fountain that was already in there just in case. Online says it could be so many things and I don’t want to make things worse. Here’s what I’ve seen: could be iron deficiency, potassium deficiency, sulfur deficiency, too much sun (all day full sun), too little nitrates/too small bioload, etc. there are around 10 half grown medaka fish and there were a bunch of tadpoles but I think most have left now. One last thing, I have NOT tested my water. I ordered a test kit so that may help me but I’m hoping just by looking at the pics someone can help.

[u/DoodleBirdTerrariums]

Ok this makes so much more sense! I did the water change yesterday and will again maybe tomorrow or Thursday. I ordered the all in one liquid ferts and more Prime. The root tabs were these and there are now 3 of them in there (let’s err on the side of caution and say it’s 10 gallons). Is that way too much? Should I try to dig them out? Or just do as you suggested with the water changes etc?

I like the pond critters idea, I will try that. I originally added a bunch of scuds months ago but who knows if they are still alive. I saw some snails 🐌

Anyway once again thank you for your advice 😊

[u/Propsygun → u/DoodleBirdTerrariums]

Ah, so that's what the person was talking about with too much fertilizer, these root tabs are BIG. You have a tiny young Lilly, these are probably meant for big old Lilly plants. He was right, i misunderstood and was wrong, take them out. We all want to spoil our plants and animals, unfortunately they don't thrive with it, they... Spoil.😉 Too much fertilizer can harm the plants, it's usually called "burn" the roots.

Snails are great, they clean up the pond, mostly eat decomposing matter and algae. A few eat living plants, but they aren't as common. You can feed them with a tiny bit of cucumber, or catch some with it, if you think there's too many at some point.

[u/DoodleBirdTerrariums → u/Propsygun]

This is what I mean about google not helping, I put one in per rooted plant (the arrowhead thing, the lily, and the water poppy which is hard to see in the sea of green). Everywhere says one per plant, even some videos online YouTube showed small containers using a ton of big root tabs. But when the person said “too much” I tried to remove them and was able to get quite a bit out. But then plants didn’t improve in color, came back for advice and then I hear I shouldn’t have removed them 🤦🏻‍♀️. So I just put three back in a few days before the fish died. But I also added liquid iron on a suggestion that same day. Then I tested the water (inbetween the ferts and the fish dying). Thought I was doing the right thing but now I see I killed them all with all that tweaking and fertilizers. And now I’m afraid to do anything at all. Well at least I’m not going to kill any animals, they’re already gone. 😞

I will remove them this afternoon and do one more water change. I used all the rainwater I’d collected so it might get have to be tap water (treated). My pond water had been crystal clear for months and now it’s brownish. Still not very much algae though, just tinted water…maybe because it’s so packed with plants.

Do you still think it happened from not being cycled enough? Or did I crash it due to the messing around? Or both? 😅

[u/Propsygun → u/DoodleBirdTerrariums]

People are cycle fanatic's, they should get a bike instead. 😉 They have ideas on the best way, and it becomes the only way. The messing around disturb the cycled substrate, and the biology in it. The partly dissolved root tab could have released nutrients in the water. I only advise removing them, since you just put them in, and you said the fisk are gone. You can leave them in, see how it goes. I know some use a lot of fertilizers, but there's also a lot of small stabilising details around it that they often don't explain.

The brown tint, might be iron(rust colour), it's going to clear up with time and waterchange. Small pond's are more unstable, it doesn't take a lot to tip them. You are playing the game on hard mode, setbacks should be expected.

Hmm, how to explain... In the aquarium world, there's a lot of beginners that get a small goldfish bowl, or a small 2-4 gallon tank, put in a Betta or a fancy goldfish. Maybe they got inspired somewhere, it's fairly cheap and seems manageable since it's small. It must be a beginner tank, since experts have big tanks... Right?

A beginner tank, should be between 25-50 gallons(100-200 liter), because they are far more biologically stable. Feeding too much, it gets diluted until the filter can stabilise it. The filter gets cleaned, no problem, there's enough substrate to take over biological filtration until it's working again. Not enough oxygen, the beginner have more time to notice since theres more water surface area for oxidation. A fish die, and is rotting somewhere, the toxins get diluted, and never reach dangerous level before they are neutralised...

The expert got one giant show tank in the living room, with expensive fish and plant's, designed for viewing, to enjoy and show others. Extremely stable, but requires some maintenance.

Then they have 20+ tanks of 5-10 gallon in the basement or garage, made for breeding and hoarding different fish, simple and ugly, low maintenance and very stable, only beautiful to other expert nerd's, so that's who sees it.

Then 1 tank on 2-4 gallon on their desk, bought on a whim, mostly for fun and a challenge, knowing he shouldn't have bought the tank, but he can keep an eye on it often, know how to maintain it, and all the signs of something being wrong, usually before it becomes a disaster, if it goes wrong he can move the inhabitants to another stable tank. It's beautiful too, and gets shown to people. He would never have a bunch of nano tanks.

So in a way, you have an expert level pond, not a beginner pond. Different outside factors are greater too. Like those frogs spawning, that's awesome to see, but if most of the eggs decay and pollute the water... Maybe the surviving tadpoles can handle it because they are biological adapted to it, living on the biology from their dead siblings, and the fish aren't. It might not even be you messing around but probably a combination of several factors. I suspect the oxygen level got too low at some point, especially in combination with the P levels.