The springtails love the water area. Like, a lot a lot. I'm a live and let live kinda person when it comes to tanks and ecosystems in general, but just want to make sure this isn't a sign of a bigger issue. 

29g tank; about 3g water when it's filled (\~ 1g now)

A few vampire crabs and 2 mourning geckos. I also have plenty of other macro invertebrates present such as whiteworms, various mites, millipedes,  dwarf white isopods in the soil. Fungus gnats, because of course 🙄 Copepods, ostracods, bladder snails, and a few types of worms (aeolosoma and rhabdocoela?) in the water.

\~ 72F, 80-90% humidity on the bottom, 65% near the screen top. 

Water pH 7.8, no ammonia, nitrites. Nitrates \~5. Moderate hardness and alk due to source water.

Light cycle on a timer, approx 14:10.

Geckos fed a premade complete gecko diet (Repashy and Pangea) in the little orange Gatorade cap, occasionally offered fruit, seen eating gnats.

Crabs fed mostly in a water bottle cap on the floor - Fish food, dried krill and fish, some tiny bits of veggies and fruit.

Tank probably set up for about 6 months, inhabitants first went in maybe 4 months ago.

Substrate in water is a mix of aquarium gravel, mineralized soil, and bentonite clay (from kitty litter). Plants and moss growing well in it. I'm growing them from the tiniest starting amounts. 😅

Land substrate is a mix of coconut coir and chips, potting soil, orchid bark, charcoal, etc. it's wetter than I intended and getting amended soon, when I get some more bark in.

Mister and waterfall feature present but I've let it dry out because my substrate seemed to be getting water logged. So the water is stagnant, but smells absolutely fine even if i stir up the substrate.

Springtails found throughout, with heavy numbers on any food I put down near the substrate. Really started to get these piles of springtails on the water maybe 2 weeks ago but nothing has changed since. 

My theory is that because the water is stagnant, they've really thrived on surface film that is forming? I never SEE any film, but obviously they could be taking care of that as it forms. But I'm not sure what would be generating the film, and if that would be concerning.

What do y'all think? What's in my water that makes it a holy gathering site for springtails, and uh, is there any reason (asides from aesthetic) to break them up?

Springtails TOO happy?