hi there just joined today as I am needed some help I have a 240 litre tank with 6 lemon tetra, 7 noen tetra, 2 rainbow shark, 2 clown loach, 4 harliquens, and 3 male guppies they are all fine and healthy looking. so onto my problem when I started I was doing twice weekly water changes of 40litres which kept the ph at 7.6, ammonia at 0ppm, nitrite at 0ppm, and nitrate at 10ppm then I started to get ammonia in the tank over the last two weeks I have had four dead fish, ammonia today is at 0.50ppm, ph 7.6, nitrite 0ppm, and nitrate 0ppm. The pet shop said to do 25% water changes every day for a week which I have done and then to do weekly changes of 25% and not to touch the filter for a month to let the bacteria build up, I also use nurafin cycle and nurafin aqua plus. I have checked my feeding which I do once a day and miss out a sunday the fish eat everything within recommended two mins so there is no waste. Is this normal and is my tank still cycling, any advice appreciated.
If your water source (tap water) has 0 ammonia in it and your tank is still has an ammonia reading then your tank is still cycling. If you ammonia reading is .5 ppm, it will be .25 ppm after a 50% water change when refilling with a 0 ppm ammonia. Basically, the bigger the water change and the more frequently the water change the better (don't do more than 50% at a time).
Continue feeding the fish. You want the waste. Fish waste is ammonia and is needed to feed the bacteria that change it into nitrate. Once the bacteria have established itself, ammonia should be a 0 reading nitrate should be present.
Beginner FAQ: The Nitrogen Cycle
Adding fast growing floating/stem plants will help a lot with the ammonia. Still need to find the problem; however, this is a good stop gap measure.
I got the sense that this was a new tank setup. When was the tank setup?
By all means, please do 50 % water changes until you get things under control...at least every other day. Again, live floating plants will do wonders and they're relatively cheap.
thanks for your your replies yes this is a new tank it was set up 6wks ago with fish being in for five weeks. checked tap water and there was no ammonia, went to pet shop today with water sample and they say my water is fine but because i lost a fish 2 days ago they said to wait another week and take another sample in to be checked before adding any more fish. I am using API freshwater master test kit is this a good kit for testing the tank water how long should i wait to add more fish.
Your tank is not big enough to keep Rainbow Sharks.
Also, they should be kept singly. As they mature one of them will undoubtedly end up killing the other.
Your tank is not big enough for Clown Loaches either. They are a highly social fish. They need to be kept in groups of at least 6.
I have a 52 gallon tank I have
six lemon tetra
seven neon tetra
four harlequin rasbora
three male guppies
two rainbow sharks
two clown loach
I would like a blue ram, two denison barb, and a dwarf algae eater would this work or has anybody got any other ideas.
thanks for this information i will get someone to take the rainbow shark but I would like to keep the clowns what do you think the tank size is 120x40x55cm
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