Copepods? Are they a sign of a healthy tank?

[Petersgirl]

Hey guys.
A few days ago I spotted what I thought were grains of sand floating around my tank. I replaced my PF Mini Filter's carbon sponges, which were due a change anyway, and washed all my white sponges in tank water to ensure they kept their bacteria. I cleared a lot of sand out of the filters (I stupidly had one literally resting on the floor of my tank as its cradle is broken) and I thought that was the cause.

I looked a little closer and realised they were small white creatures with odd, quick movements and on closer research, I believe them to be copepods. I have also found a tiny snail attached to my tank, although I don't know how it got in.

I have read copepods are harmless and are a sign of a healthy tank, but also that they're a result of overfeeding. Are they a sign of a well established tank and should I cull them a little if there's lots? Are they really completely harmless? I just wondered because if I am overfeeding it actually implies I don't have a healthy tank >.<

Also, what about the snail? To free or not to free?

 

[Jennewt]

Right, copepods are quite harmless. The only way to know for sure if you are overfeeding (or under-cleaning) is to test the nutrient levels in the water. In particular, how high is the nitrate level? If it's high, you need to be doing more/larger water changes. Also look carefully and remove uneaten food after feeding time.

Snails often arrive with live plants, or anything live from the pet shop. It's a matter of preference. I don't mind having some snails in my tanks, but some people don't like them.

 

[Jennewt]

I just saw your other post. If the nitrate level is 10, I don't think you have anything to worry about.

 

[Petersgirl]

Thank you Jennewt! That's good to know. My nitrate level is generally 10 - 20 ppm, so it's all good I'm not even sure where the wee snail has got to but I doubt he can do any damage anyway. Thank you!