URGENT HELP

buhaglou quote	subscribe [rss]	subscribe [email]	#1	Posted 04 Jul 2008, 11:14 am
I have a 25lt tank with 12 small fish ( 7 tetras and 5 guppies). Last week (after around 6 months) six died one by one. I checked the water with the 5 in 1 test strip and everything is OK. The tempreture is around 25C. I changed the water and removed the plant which had turned black and replaced it with a plastic one. After the water change the test came out with the GH a bit on the high side. I replaced te water with some distilled and it came out OK. However, today another one is dying. I don`t know what to do to try to save the remainging fish. Sponsored links
meliss_cole quote			#2	Posted 05 Jul 2008, 11:57 am
Do your fish show any ill symptoms before they die? Do they appear to be gasping for air at the surface or do they seem to have labored breathing? The reason I ask this is because you mentioned that your plant turned black before you removed it from the water. This can be an indication that there are large amounts of phosphates present in the aquarium which can indirectly be harmful toward fish, and can also turn your aquarium plants black. Phosphates are constantly present in all aquariums in small amounts. When phosphate levels get too high it can result in an over growth of algae which can lead to low levels of oxygen and that is why it is dangerous for fish. Have you noticed an increase of algae in your aquarium? If you want to maintain phosphate levels you can do more frequent partial water changes and clean your filter more often, feed your fish foods that contain less phosphates, or use phosphate absorbers to quickly remove phosphate from the water. I hope this has been helpful in some way.
mickey quote			#3	Posted 07 Jul 2008, 11:57 pm
do you have any recent test results from your water Melissa is right what she is saying about phosphates in the water,I even test my mains water for them upping the water changes will help but if your mains water is of a very low quality then you will need to combat then before they are introduced to the tank with the water changes. with the size of your tank its not too easy as larger tanks will just have phosphate remover added to the external. Could just be a low oxygen level problem ,if so add an airline to redox the water http://www.fishtankforum.co.uk