Thanks, I'm enjoying it. I almost went spider plant for my emerged but went this route on accident. I bought the aluminum plants from a LFS and then read about them later (you think I would learn not to do that). Come to find out they are one of the many plants sold as aquatic but don't do well submerged. so instead of spider I went with them and the mangroves. I'm not sure what I'll do with the mangroves when they get bigger. At some point I'll have to buy a hanging kit for the AI prime and make it higher. A buddy of mine has a rather large mangrove he's had for about 4 years in freshwater. He just bought a new tank and a colony of wild caught mollies and is going to put it in there. I'm pretty sure it may be one of my favorite tanks once it's together. Simple but pretty in the fact it's a natural for those two to be together in the wild. I still have no idea what I'm going to stock as far as fish go, I just know I want shrimp so it has to be shrimp friendly. I'm still leaning toward endlers, or a I may start digging into some exotics. Then again, some mollies would be a good addition as well. They are easy fish and worker bees, plus active swimmers so they can be fun to have.The photo was from the high point of my tank. As the discus grew and realized the shrimp could be food it was suddenly a shrimp slaughter. Most of the red shrimp just stayed under the canopy and lived there. I added some feeder shrimp to keep things cleaned up on top of the plants and figured the discus could eat them if they wanted. The discus totally ignored them, but if a red one showed up on top they were on it immediately.
I recently sold the discus and am going to stick with Cardinal tetras and Red Neo shrimp. I have a 7 gallon that is coming up on 3 years old that works well with that set up. I used co2 in the beginning with both of them to jump start things. I think it caused issues with the 120 gallon because the H. Cuba grew in so thick that it killed off its roots. I think if I had turned it off sooner I could have prevented that but I was concerned about letting the pH rise while the discus were in there. I have been slowly tearing out the Cuba and moving to Glossostigma. It doesn't look as cool to me and I might go back to the Cuba and just pull the co2 as soon as the carpet starts to fill.
I grew the H. Cuba in a tank on my back patio and it did really well until winter hit. I don't think you need c02 but it is fun to see grow like they do when you use it.
I had an extra pH controller from a calcium reactor that I wasn't using and controlled my co2 dose that way. 2 bubbles per second on the 120 could drop my pH to 7.0 pretty fast. It was never constantly on. I keep crushed coral in my canister filter and so my water is really hard. I cant imagine how fast pH would drop if I had softer water. The LFS as well as my only friend that grew plants both just go with the bubble count method and turn it off at night. My friends tank crashed and he shut it down. Bubble count method just seems like kind of a loose cannon to me.
Emergent plants have worked great for me to keep algae in check. I have tried spider plants, most floating pond plants and some decorative bamboo. The spider plants have done the best job for me. The bamboo lives, but does not really send out roots. Floating plants have a done their job to fix algae issues but they block light, so not a permanent fix. I think your Mangrove is awesome!
I have a small all in one uv sterilizer I can just drop in the tank when I get green water. I like it. I think it was $30 on amazon. The uv won't fit in my 7 gallon. The pond plants I used brought in some daphnia. They bloom with the green water and will clear it up. Fish love them. Generally, it seems like after my tank is a few months old and the shrimp population grows then everything stabilizes. If things go weird I just change some water and it comes back around. I have some 2 gallon set ups that go with no filter. I keep shrimp and occasionally a couple guppies in them. They work and I think it is totally doable to go no filter on a large scale.
It is a cool project you have going on. Thanks for sharing it.
The only thing floating for now is the pennywort, I floated it because I didn't know where to put it, but kind of dig the look. As far as filtration goes, it's really just a filter sock, some chemi pure green and a little ceramics for bio.





