Moomar Posted June 27, 2021 Share Posted June 27, 2021 Shrimp tank woes/old tank syndrome/chlorine readings I have an established 20 gal tank of 3 years that I converted into a shrimp only tank for my neocaridina shrimp about 2 months ago. I also have one bristlenose pleco and a mystery snail. In the past two months, I have added live plants such as hornwort, Christmas moss, Java fern and Anubia. I have inert substrate My water parameters are currently as follows: 72 degrees GH 8 Nitrite 0 Nitrate 25 Chlorine 0.8-1.5 (without prime) KH 4 pH 7 TDS 415 I have very hard well-water, so I use an RO unit that I remineralize with Shrimp mineral GH/KH+. I’ve been slowly trying to remove 5% water 2-3x a week and replenishing with new water. About a month ago, I started noticing KH and pH drops. I added a small bag of crushed coral to my HOB filter. I also should add that I added a sponge filter for extra filtration and oxygen. I started to notice that I would get chlorine readings on my test strips almost every morning or every other morning. I would dose the tank with prime and it would register as 0. I don’t understand the chemistry enough as to why chlorine would show up in my tank as I do not add any untreated water. Could it be the crushed coral? Is it old tank syndrome combined with crushed coral? I have removed the bag of crushed coral in the meantime. I have lost several shrimp in the past two months, but currently the shrimp have been doing well - several berried and I see shrimplets, and my mystery snail had laid many clutches, but the chlorine readings worry me and I end up dosing prime directly into the tank whenever I notice it. But, if I’m not in town for a period of time over a few days, I’m worried that the chlorine levels will rise and I will come back to the entire colony being wiped out. thanks in advance for any insight Link to comment Share on other sites More sharing options...
tonyjuliano Posted June 27, 2021 Share Posted June 27, 2021 You state you have a well. But it’s chlorinated? Please clarify. Link to comment Share on other sites More sharing options...
Moomar Posted June 27, 2021 Author Share Posted June 27, 2021 Thanks for asking! I looked into my water source and it is a combination of well water, imported water and local rain run off. We have a water softener, so I have been using an RO unit. Link to comment Share on other sites More sharing options...
Ty Lynch Posted June 27, 2021 Share Posted June 27, 2021 It sounds like adding dechlorinator would be an easy fix if you are not including it already. I would even suggest doubling up on doses as it doesn't appear to be harmful at these levels. Link to comment Share on other sites More sharing options...
Moomar Posted June 27, 2021 Author Share Posted June 27, 2021 Thanks! I have been adding prime, to all water before I add it to the tank. The weird/unknown thing to me is understanding why I get chlorine readings at all once the water is in the tank. But, I continue dosing to the tank as needed. My issue is that I test it every morning and most mornings the test strip registers some chlorine, so I add more prime and then it goes back to 0. Link to comment Share on other sites More sharing options...
tonyjuliano Posted June 27, 2021 Share Posted June 27, 2021 On 6/27/2021 at 5:56 PM, Moomar said: We have a water softener, so I have been using an RO unit. Most RO units cannot effectively remove chlorine/chloramine. You should dechlorinate using one of the “expensive” products (Seachem Prime, etc.) or this can be done with plain old vitamin C (ascorbic acid). On 6/27/2021 at 3:05 PM, Moomar said: But, if I’m not in town for a period of time over a few days, I’m worried that the chlorine levels will rise The chlorine levels will never rise (without the introduction of more chlorinated water), in fact - the opposite will occur. Link to comment Share on other sites More sharing options...
Moomar Posted June 27, 2021 Author Share Posted June 27, 2021 Ok thank you for clarifying it! I use seachem prime in the RO water as well. I’ll double dose it! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now