what are these?

Question

i have a new fishtank, of which i have not stocked yet, reasons are that the water hasnt quite got to safe nitrate/nitrite levels yet..but i have noticed these really tiny white organisms jittering about, where have these come from, or what are they..have done two 75% water changes for the record!

Answer 1

Freshwater also has phytoplankton and tiny animals (insofuria, copepods, amphipods and rotifers) that feed off of it. Your tank is fine as parasites are always found attached to of in the fish. Your fish will love snacking on them when you do stock your tank. Incidentally, fish breeders regularly encourage the development of these little critters to feed small fry.
A

Answer 2

Could be nematodes. they're usually harmless.

So are you doing a fishless cycle?
Here's an article on it:
http://thegab.org/Articles/FishlessCycling.html
It's well worth the wait to get your biofilter established before adding fish.

Also here's a good article on what happens the first month or so in a new tank and how to keep your water from getting toxic.
http://thegab.org/Articles/WaterQualityCycling.html

Answer 3

did you put liverock in your tank? If so they probably came with the rocks. I sometimes get little star fish come with my rocks. You can either wait till these get bigger before you add your fish or wait for them to die off and let the filter run it's course.
Good luck!

Answer 4

Some little invertebrate, probably nothing to worry about. I want to commend you for cycling your tank before adding fish, bravo!

Answer 5

They sound like pods, which is a good thing. Lots of fish eat em, and its a sign your take is becomming established.

Answer 6

could be air bubbles if you have put clean water in let the filter start to work properly

Answer 7

Do nothing, let your filters run for 2 weeks, then do your tests, all will settle, best of luck.