@epilog-de.bsky.socialAtlantisches Becken im Aquarium ›Unter den Linden‹ in Berlin von 1869.
#aquarium #historischesbild #geschichte #berlinerbauwerke #berlinarchitektur #berlin #architektur #berlingeschichte #architekturgeschichte #damals #zeitreisen
@joshbarbershop.bsky.socialFishkeepandChill is a great fish keeping resource! #Fish #science #aquarium #animal #photography
@tahir-cse.bsky.social
@unicun.comEver wonder what your fish talk about behind your back? 🐟 Now you can spy on them from their POV! With spotlights and a feeding arm, it's basically an underwater paparazzi mission. Check it out here: https://unicun.com/product/remote-control-submarine-camera/
@spottedcongo.bsky.socialAnyone got a toothpick for my friend? #SpottedCongo #pufferfish #aquarium #wildanimals #pets
@aquaristedge.bsky.socialWhy does a healthy tank smell like rain? It's geosmin, made by bacteria living in your gravel and filter, and your nose can pick it up at a few parts per trillion. Short doodle animation: youtu.be/UP9l7iqtbsI #aquarium #geosmin
@onlyfinsoffishial.bsky.socialThe Zebra Loach (Botia striata) is native to India and loves to hang out in little crevices in the tank, looking for food. #fish #aquarium #science #animals #aquascape
@yazmineartelier.bsky.social
@phototjv.bsky.socialDaisy's Ricefish
(Chester Zoo, Chester, June 2026)
#photography #animalphotography #macrophotography #zoophotography #zoo #animals #fish #aquarium #freshwateraquarium #freshwaterfish #fishtank #Ricefish #DaisysRicefish #DaisysBlueRicefish #ChesterZoo #Chester
@tanktherapyart.bsky.social“BOTTOM FEEDER… TOP TIER! 😂🐟 The Funniest Shirt for Fish Keepers!” www.redbubble.com/i/t-shirt/Fu...
#TankTherapyArt #aquarium #aquascape #FishKeeper #AquariumLovers #AquariumLife #FishTank #FishKeeping #Aquascaping #TropicalFish #FreshwaterFish #FishLover #FunnyFish #FishHumor
@aquaristedge.bsky.socialEver wondered why your tank glass feels slippery? That's biofilm. My new 2-minute doodle shows what it is, why your filter bacteria live in it, and why shrimp and snails graze it all day. #aquarium #biofilm youtu.be/O5Qr6zPPQdE
@donsenilo.bsky.social
@daniel.colquitt.xyzTap-water nitrate T is modelled separately as a slowly varying Gaussian random walk. That is an assumption, but a more plausible one than treating the supply as perfectly constant.
[4/10]
@daniel.colquitt.xyzThis is the same mathematics as the “nearly constant velocity” model used in target tracking: N takes the role of position and r of velocity.
[3/10]
@daniel.colquitt.xyzMy hidden state is
x = (N, r, T)
with r the net accumulation rate and T the nitrate concentration of the tap water.
[2/10]
@daniel.colquitt.xyzI have, perhaps inevitably, built a Gaussian assumed-density filter (GADF) to estimate nitrate in my #Aquarium .
I initially thought of it as a #KalmanFilter , but parts of the physical and measurement model are non-Gaussian, so GADF is the more accurate description.
@daniel.colquitt.xyz.ap.brid.gyI have, perhaps inevitably, built a Gaussian assumed-density filter (GADF) to estimate nitrate in my #Aquarium.
I initially thought of it as a #KalmanFilter, but parts of the physical and measurement model are non-Gaussian, so GADF is the more accurate […]
@nilssandrisser.bsky.socialTwo of them recently started a brood, and the others also act as a pair.
Any cichlid experts around here who could give a possible explanation for that? Thanks a lot in advance!
@nilssandrisser.bsky.socialThis ist my group of 4 firemouth cichlids (Thorichthys meeki), busy with their ritualised negotiations of rank orders. In their phaenotype, they''re all male (pointed dorsal fin, genital papillae). But there's something weird about them.
@aquaristedge.bsky.socialYour TDS pen measures how much is dissolved in your tank, not what it is. I made a 2-minute doodle on what that number means, why it creeps up between water changes, and why shrimp care. #aquarium #fishkeeping youtu.be/Z8--_iAjmMc