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fish dying


Gill

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After a 5 days of doing 50 % WCs day on my 600L tank due to unexpected high ammonia readings ( I gave up testing using my kits and went to the local fish shop to ensure reliable readings )also lifting wood and rocks to locate any rotting matter which unfortunately included dead clown loaches stuck deep in a wooden cave. I finally think I have found the problem a clogged FX5 which I only cleaned 6 weeks ago had two Clown Loaches stuck up inside where the water comes back inside the tank. No wonder the filter was struggling . I think they must have gone up there during the purging ... Filter rinsed out with tank water and blocked cleared . All up I have lost 8 of them :-( I will continue to do WCs but the remaining fish look to be recovering fingers crossed...

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I have no idea only that there was one stuck in the wood I didn't realise that the cave went so deep ,I wonder if he got stuck and couldn't get out . The BN lives there and he's big . There is still a little ammonia but its much lower and the filer is pumping like mad I can see the bubbles pouring into the tank . I will have to keep a much closer eye on it . When I picked up the wood about 10 swam out of a crack I didn't even think 10 could have fitted in there .I have removed the wood for now ...

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Clown loaches like to hide in spaces you never would have thought existed, its just the way they are...

is your ammonia level dropping slowly? if so your nitrite should start spiking (mid cycle) then nitrate... i'd keep up the water changes while this happens, be sure to add prime or similar each time to help that cycle

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In total 25 CLs have died in one week despite doing WCs and treating for ammonia. Absolutely gutted right now. LFS have not heard of fish finding their way up the inlet. What a terrible journey this has been. It has happened so fast . We are going to put some sort of net over the inlet to prevent CLs from getting in again, all we can come up with is that they snuck in there during the purging process. Got to get over the shock first but I will get some more eventually.

Gill

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All i have is wood in there , it has been in there for ages.Nothing is leading me to suspect it was the wood . I suspect it was the fish stuck up in the filter pipe . It was way up there and only came out when i flushed water through from the other end . The filter had been rinsed out with tank water 3 weeks ago . Weekly water changes ,Last week i noticed the fish spending more time at the top of the tank so i tested the water and the ammonia was up , started WCs, took water to test at LFS ammonia still a bit high , continued with WCs had a good look around the tank lifted all the wood etc, found a dead fish hidden deep in the cave ..., WCs WCs decided to check the filter again and we did a partial filter clean that's when the fish came out of the pipe... WCs added prime continued etc... A sad few days with three or four fish each day succumbing ....

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