Advice On Pleco And Tetras Compatibility.

MyzTracy

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Hi everyone,
 
I am a newbie and also the owner of a 10 Gallon Freshwater tank for about 6-8 months now. I purchased 2 Serpae Tetras and 2 Neon Tetras all young males from my local Petco store. They all have been coexisting well together, I clean the tank once per month, test the water regularly, feed them as recommended, keep the water at the temperature suggested and filtered. They all seemed healthy and happy fish. I then wanted to buy a algae eater and with the advice from the Aquarium Specialist a spotted Bristlenose Pleco was recommended for me to get. It was also a male, around 3.5" and appeared healthy. The Serpae tetras were not bothered by this fish but the Neon Tetras started to hide a lot. Two weeks later with no warning both Neon Tetras died within a week of each other. There were no visible discoloring of the fish or cloudy eyes, bloating or lack of appetite to indicate my fish were sick. I changed and treated the water immediately just in case of contamination in the water. My Pleco is now 8" long and I think my tank is too small for him, I was not informed he would keep growing so big when I asked if my size tank would be alright he said yes. 
 
Is there a chance my Tetras died of shock with introducing a larger species than them? My tetras are around 3"-4" long. Is there a possibility my Pleco is sick and infecting the water? I spent hours researching compatibility of the two species and some sites say yes they are fine, some say no they are not compatible. I feel I need to take back my Pleco so someone with a bigger gallon tank can give him a good home, perhaps someone can suggest a smaller breed of algae eater that is more compatible with my tetras and also shed some light on what has happened in my case. I do not want my other Tetras dying. Thank you in advance.
 
10 US gallon (~38 litre) tanks are pretty small in the grand sclae of fishkeeping and need extremely careful stocking. In a small tank, toxins can reach lethal levels in a heartbeat.
 
The tank needs fresh water more than once per month, standard practice for many is ~50% changes every week under non-emergency conditions.
 
Please rehome that pleco ASAP, an 8" fish has no place in a tank less than 240l right now, but long term it could easily be a species that will double its size to ~15" and need a 5x2x2 tank at the very least.
 
Adding the plec, even at 3.5" was the likely trigger for your situation, its body could easily fit your four other fish inside its body. This massively increased the bioload of the tank and no doubt caused dangerous levels of ammonia and nitrite that the existing bacteria could not cope with.
 
Using a liquid test kit, what are the tank's ammonia; nitrite; nitrate levels? 
 
N0body Of The Goat said:
10 US gallon (~38 litre) tanks are pretty small in the grand sclae of fishkeeping and need extremely careful stocking. In a small tank, toxins can reach lethal levels in a heartbeat.
 
The tank needs fresh water more than once per month, standard practice for many is ~50% changes every week under non-emergency conditions.
 
Please rehome that pleco ASAP, an 8" fish has no place in a tank less than 240l right now, but long term it could easily be a species that will double its size to ~15" and need a 5x2x2 tank at the very least.
 
Adding the plec, even at 3.5" was the likely trigger for your situation, its body could easily fit your four other fish inside its body. This massively increased the bioload of the tank and no doubt caused dangerous levels of ammonia and nitrite that the existing bacteria could not cope with.
 
Using a liquid test kit, what are the tank's ammonia; nitrite; nitrate levels? 
Thank you so much for response, I am returning the Pleco today and getting snails, I appreciate your feedback in regards to changing out the water once per week 50%, I do 50% once per month but will def increase that. I am also taking a sample of my water today to be tested properly to see if there is any problem with the ammonia levels, I am just going to have two Serpae Tetras (Remaining) to stay in my sized tank, I do not want to over crowd and I think with changing the water more frequently I will not need an algae eater. Funny enough the guy who worked at the store stated he was a "expert" but in fact was fired 2 weeks ago and gave me the incorrect information. I care about my fish and do not want to neglect or harm them unintentionally in anyway. Thank you once again for your help.
 
Totally agree with Goat :) Excellent advice (as ever!!)
 
With the remaining fish make sure you get a proper school of Tetras not just one or two they are a schooling fish so need to be part of a group to be happy and with nippy tetras like Serpaes a group will help stop too much infighting.
 
Wills
 
Wills said:
Totally agree with Goat
smile.png
Excellent advice (as ever!!)
 
With the remaining fish make sure you get a proper school of Tetras not just one or two they are a schooling fish so need to be part of a group to be happy and with nippy tetras like Serpaes a group will help stop too much infighting.
 
Wills
Thanks Wills, So it turns out the guy was 100% wrong in the species he sold me, he sold me a Catfish not a Pleco! No wonder my little fish freaked out. My ammonia levels were excellent but my nitrate levels were slightly off so I have treated the water and will test once I put the filter back on. There is only 2 Serpae Tetras left so if anything I will buy 2 more so there will be 4 in the 10 Gallon tank, anymore I feel would be too much.
 
TBH, I think serpaes need more room than a 10 gallon. You can not fit a proper school ( 7+ ) in there without overstocking. Would you consider returning the serpaes and opting for a smaller tetra type like ember or green neon?
 
MyzTracy said:
 
Totally agree with Goat
smile.png
Excellent advice (as ever!!)
 
With the remaining fish make sure you get a proper school of Tetras not just one or two they are a schooling fish so need to be part of a group to be happy and with nippy tetras like Serpaes a group will help stop too much infighting.
 
Wills
Thanks Wills, So it turns out the guy was 100% wrong in the species he sold me, he sold me a Catfish not a Pleco! No wonder my little fish freaked out. My ammonia levels were excellent but my nitrate levels were slightly off so I have treated the water and will test once I put the filter back on. There is only 2 Serpae Tetras left so if anything I will buy 2 more so there will be 4 in the 10 Gallon tank, anymore I feel would be too much.
 
a catfish is a pleco
 

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