I've had my 20 gallon planted community tank established for almost a year now, and as I recently just did a major water change, re-arranged the aquascape, and wiped all my equipment down, I felt it would be a good time to update. Originally, I started with 1 female pearl gourami, 10 zebra danios, and 9 Amano shrimp. Saddly, 5 zebra danios died off relatively quickly from internal parasites I assume they had come from the lfs with, I treated the tank and all other fish survived. I added 3 more zebra danios to bring that number up to 8. Fast forward about 9 months later where nothing has been added in terms of fish stocking. I've been doing regular water changes, at 50% every 2 weeks or so. now I have 1 pearl gourami(who has grown about an inch in the past 10 months), 7 zebra danios, and 7 Amano shrimp. I have no clue what happened to the 1 danio and 2 shrimp, but all the others seem to be fine. The main reason I ended up "overhauling" the tank's layout and a very large water change was because I noticed damage on my pearl gourami's tail fin, previously when I had to deal with zebra danios coming home with tail rot, I treated with salt, but this isn't nearly as bad so would stress guard and frequent water changes be enough? For plants I have 9 stems of some sort of ludwigia, it's pretty red though so I assume it's happy, 2 anubias, too many stems of anacharis, micro sword, an argentine sword, and some small windelov java ferns. My current equipment is an aquaclear 50 (motor went out for a week, and so now I'm doing a minor cycle and treating with prime and stress guard to try to keep all fish alive), a 150 watt aqueon pro heater, A finnex 24/7 planted+ SE, and a DIY CO2 system that hasn't been running for about 6 months despite how easy I made changing out the CO2 semi-monthly. Anyways, my question is this. About 9 months ago I noticed some mini ramshorn snails. Now, these guys aren't like normal ramshorns, I feed moderately, do random 10% water changes with the gravel vac whenever I feel like there's a significant amount of detritus in the aquarium, and crush them when I see them... Theres still too many. They reproduce extremely fast and I find them everywhere when I look closely. I don't necessarily mind having a bunch of mini ramshorn snails at this point, but it did introduce me to a new species I am interested in keeping, being dwarf chain loaches. I want to know, would it be okay to add 1 more zebra danio, along with 6 dwarf chain loaches to complete the stocking (after the tank finishes its mini-cycle of course)? From what I've gathered that would be an acceptable max stock for a 20 gallon long, planted tank. And also, where could I find them for less than or equal to $10 per loach online? They seem really hard to find, and the only in-stock ones i can find were $14 each. If anyone has noticed these guys are in-stock on any online fish stores, i would appreciate it if you could post the link here. Thanks. Finnally, what plant(s) should I get to fill in the empty forground on the right side of the tank? Anything that is fine in medium light with low intensity co2 injection should be fine.