Fish slowly die, please help

Hi, I have had a tank for about a year now and since then have learned quite a bit about the hobby but one things has haunted me ever since I started.

My fish die slowly one after the other. About 1-4 weeks apart one of my fish dies and most often it's a molly or a guppy. I've owned an ancistrus from the beginning and he seems fine as well as a small group of Corys and a pair och butterfly Cichlids who never show any signs of problems. If the fish all died och all showed sickness in a small window I'd understand but it is so far apart. How can a do anything to fix this?

It's a 40 gallon and i do weekly water changes of about 20-30%. The temp is 24 C°, the pH is about 7.5-8 and from what my tests can tell there is no nitrite, ammonia or nitrate. I feed flakes, algae wafers and frozen blood worms since that is the only thing my lesser spiny eel eats from what I've tried.

Can someone please help or give me some tips, i just want everything to work fine

 

Hi, I have had a tank for about a year now and since then have learned quite a bit about the hobby but one things has haunted me ever since I started.

My fish die slowly one after the other. About 1-4 weeks apart one of my fish dies and most often it's a molly or a guppy. I've owned an ancistrus from the beginning and he seems fine as well as a small group of Corys and a pair och butterfly Cichlids who never show any signs of problems. If the fish all died och all showed sickness in a small window I'd understand but it is so far apart. How can a do anything to fix this?

It's a 40 gallon and i do weekly water changes of about 20-30%. The temp is 24 C°, the pH is about 7.5-8 and from what my tests can tell there is no nitrite, ammonia or nitrate. I feed flakes, algae wafers and frozen blood worms since that is the only thing my lesser spiny eel eats from what I've tried.

Can someone please help or give me some tips, i just want everything to work fine

Is it worms? That is very strange, when my fish had calamus worms only livebearers died.

 

Is it worms? That is very strange, when my fish had calamus worms only livebearers died.

Is there a way to check for that? I've never even considered worms

 

Is there a way to check for that? I've never even considered worms

if it is calamus, you will see red worms coming out of their bottom, another way to check is if a fish has pale white stringy poo it usually means they have a parasite.

 

if it is calamus, you will see red worms coming out of their bottom, another way to check is if a fish has pale white stringy poo it usually means they have a parasite.

Oh, thanks so much, I will check for that

 

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