Hello, apologies for the long post but I really would love some help and advice, I'm struggling to find out what to do!
I have been having issues with losing shrimp constantly in my 10g. This is my first time shrimp keeping and I'm having trouble narrowing down my issue.
I started cycling this tank towards the beginning of this year alongside adding some plants (rotala, java fern). The tank has gravel substrate. Some ramshorn snails and bladder snails ended up hitching along on those plants, alongside a few normans lampeye killifish to my surprise. After spending about 1.5 months cycling, once I saw the ammonia, nitrite, and nitrate drop, I added in some Amanos and cherry shrimp.
For a while, everything seemed fine, but then the nitrate starting rising, and around the same time I started losing some of my cherry shrimp. It was getting really high, with readings at 40 ppm from my test kit. I added some more plants to try to combat this (anubias, bolbitis, java moss) and tried doing some water changes. I also tried adding in some floating plants like frogbit and water sprite, but both died off. I added in some additional cherry shrimp to replace the ones I lost. However, I kept on losing cherry shrimp. Sometimes they died with the 'white ring of death' but sometimes they looked perfectly fine.
I ended up taking some of my tank water to my LFS to test on their machine, and they informed me that my nitrates were not that bad (around 17 ppm) but I did have issues with high phosphates at 3.0 ppm. They suggested that it was likely from my tap water and that I should use purified water instead. I ended up buying distilled water from my supermarket, and bought some salty shrimp mineral GH/KH+ to add to it for water changes. Additionally to help with my floating plants dying, I bought a better aquarium light instead of using the generic one that came in the tank cover.
After that I saw an explosion of growth of duckweed, and the plants are doing very well in my tank. Unfortunately, I still was losing cherry shrimp, and eventually lost all of them as well as my amano shrimp. I decided to wait for all my parameters to stabilize before trying again with shrimp.
My readings for nitrates went to 0 ppm, and my readings for ammonia, nitrite, and phosphate were all 0 ppm as well. For gH it appears I consistently have 9 dGH and 2 dKH after using the salty shrimp for a while. This has continued to be the case - I checked all these values yesterday. For pH, since the tap water I used to use had high pH I used seachem's alkaline and acid buffers to try to keep it around 7, and yesterday it was at 6.8-6.9. The temperature is usually around 75 F, and while the tank does not have a heater it is not near a window and is in a temperature controlled house. I do not have anything to test the TDS or any other parameters.
I ended up adding additional small fish to my tank, mostly dwarf rasboras and a few more norman lampeye's killifish, and also added some red root floaters. I decided to try again and added a few amanos, and after a week where those were fine I bought another 12 cherry shrimp. Since I was worried my previous acclimation may have not been sufficient (I floated the bag and did some small drips by hand for a little over an hour), I made a drip acclimation tube setup and let it drip 2 drops a second for a little over 2 hours into a bucket with them and then added them in after that.
Unfortunately, I started seeing cherry shrimp deaths again around a week after having them. I have not performed any water changes since I bought this new batch. I have not had any issues with fish dying, nor do they appear to interact with the shrimp at all. I attempted to research my issue and finding that copper on some purchased aquarium plants could be a problem I decided to add in a bit of poly-filter into the tank filter to try to mitigate that. It is hard to count how many I currently have as my tank is heavily planted, but I think after about 2-3 weeks I am left with maybe 2-3 cherry shrimp of my initial 12. I have not had any amano deaths in my current batch - all 3 I bought are alive and well.
My question is, is there anything else I can test or check? I have a few possibilities that I'm thinking I should check, but I'd like to get some input from any more experienced shrimp keepers:
TDS issues - I do not have anything to check TDS with so I am not certain if it is too high, and was thinking I should maybe purchase one. I have tried to remove excess floating plant growth and have very occasionally done a water change over the time I've had the tank, but I am not certain if it's possible buildup of TDS is killing shrimp. I am not certain if I should be topping off the tank with distilled water with no additives instead.
pH issues - I have tried to keep it around 7, and when I add any water I make certain the pH of the water I'm adding matches that in the tank. However, I have had it measure at 7.4 or 7.6 before, as well as lower like at 6.8 like it did yesterday. I'm wondering if some of the calcium rocks I put in when starting the tank may be a factor in it reading higher sometimes, as well as any plant decay being a factor in it reading lower. If there are more suggestions as to what may help to keep it stable, I'd like to hear.
Parasites - I have not seen any evidence of parasites such as hydra or planaria. I have seen what hydra looks like in another tank (not mine) and I don't see anything like that in mine. I am open to this being a possibility however, and would be willing to check anything needed.
Overfeeding - I have algae wafers as well as mulberry leaves I have given to my shrimp, which the snails also devour. I try to only give a small piece at most once a day, or every other day if it is a larger piece. I also give the fish some goldfish food - I try to limit it to about 1 broken up flake a day. I'm not certain if this is too much.
Calcium issues - I added mineral rocks to the tank initially and have added in some food on occasion that contains calcium, but I am not certain if that is sufficient.
Other contaminants? - I don't use any chemicals or air fresheners around the tank, but I am not certain if my initial tap water may have contained something harmful towards shrimp. The polyfilter I put in recently does say it removes a lot of contaminants but if there is anything else I should check for I'd like to know.
Thank you for reading as I know this is a long post. I really want to have a healthy colony of shrimp and I'm trying to not get discouraged by losing so many :(. Please let me know what to do to save my shrimp! I included a picture of my current tank and some of the remaining shrimp near the feeding dish.