I added similar looking stuff , but it was residue/bacteria from filter hose.
Looks like detritus worms. Planaria are flatworm's that glide across the glass.
I got them in my betta tank. They atleast help with clean up in the tank and provide my betta with extra snacks throughout the day. I honestly like them more then these bladder snails I got in almost every other tank. They're less noticable and the fish can eat em without having to wait for me to crush em up like I do with the snails.Looks like worms not bacteria.
Thanks, looking those up it seems about right. Ever since I added gravel, I don't think my fish finds all pellets it missed during feeding, that caused this.
Ruturaj do you have a lot of algae in the tank that you are trying to eliminate? If so, I would increase the surface agitation because as the algae dies off, it tends to decrease the amount of O2 in the water.
Also be sure to dose according to the instructions and follow the recommendation to remove any dying algae.
I tried this product once and even though I followed the instructions, I noticed the fish acting oddly so increased surface agitation and did thorough substrate vacuuming to remove dying algae along with a 50% water change. The fish improved quickly.
I try to refrain from using chemical corrections for most issues.Not a lot, just a thin layer on glass, just vanishes when I move sponge over it, I thought by using algaefix it wouldn't come back. My fish looked like to be slightly in stress but nothing significant. May be the worms are coming out for the same reason. Surface agitation is through seachem tidal filter only but seems to be doing well.
I try to refrain from using chemical corrections for most issues.
The thin layer of surface algae is normal and a good thing.
Algae can be controlled by other methods.
Reduce feeding, reduce light, increase filter maintenance and water changes.
It would be my advice to do several water changes to dilute especially if the fish are agitated or stressed.