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Beautiful plant pond! Thanks for pictures.

Daphnia: Despite multiple attempts, I have had no luck growing daphnia (assorted wild species of all ages) in aquariums. And setting up tubs outside just encouraged mosquitoes and frogs. I gave up.

Daphnia do fine outside with cool/cold temperatures. This spring, I netted out a lot of daphnia from my pond.

However, for reliable feeding of live food, I've gone with hatching brine shrimp eggs and growing the shrimp out for a few days. (My baby guppies get live brine shrimp twice a day.)

A "How-To" article on hatching/raising brine shrimp is on my web site:

https://dianawalstad.com/aquariums/
 

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I think that the Daphnia will not live in the house - she needs a lot of water, light, air, and plant food.
Daphnia when get to cold or to hot outside lay eggs wich cand survive fost or very high temeperatures, if u let pond substrate like it is now over winter in spring when its over 13 degrades celcius daphnia eggs wil hatch :).

If you want to keep daphnia indors put them in a aquarium 25 liters with a airline that make very big bubbles ( reson is that fine air bubbles get traped under daphnia shell and can't swin for food and die), you feed with yeast or powder milk, u take small glass put water a little bit of yeast or powder milk give it a good mix and leave it 30min, then pour the mixture in were u keep daphnia until you clowd the water but you still can see through the water, daphnia will clear the water in about 1-2 days depens on how many they are, when water is clear make a other mixture a feed, what remains throw away.

Thank you!
 

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Discussion Starter · #51 ·
I had a too small aquarium - now the aquarium is larger.
I did not like the nutrient under the sand - I washed the sand, now the sand is clean.
Fish are too finicky - they breed little, sometimes they get sick.
I want other fish, and put a filter.
 

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Discussion Starter · #52 ·
I put the filter. My filter.
I take a large plastic bottle so that the entire assembly in height is equal to the height of the aquarium.
I completely perforate the bottle with a hot nail.
I cut a hole in the cork under the pump.
The pump is selected at the rate of 10-15 liters of aquarium per 1 watt of pump power.
The filler must be non-porous (!) - glass balls or river pebbles.
I put three black filter socks on the bottle and fix it with a black screed.
I put the filter in a dark plastic glass, and I lower this whole pepelats into the aquarium.
The filter works so well on algae that the aquarium can be safely placed on the window.
 

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Discussion Starter · #53 ·
Water flows through the top into the outer cup, and the trash, even if it does not stick to the filter sock, still remains in the cup.
Then the water from the outer cup passes through the filter sock and ends up in a bio-filled bottle.
Water passes bio-filler and the pump throws water into the aquarium.
 

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Neat idea with the outer bottle, but wondering why do you insist on "inert" pebbles? Wouldn't ceramics media or sponge work better? Even if not as biological, but more efficient mechanical filtration.
 

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Discussion Starter · #57 ·
A month ago, I decided to try to switch to rare substitutions.
50% once a month.
Yesterday a month passed, the water also stood for a month - made a substitution.
Old zebrafish started spawning in a common aquarium, like young ones.
Plants seemed to like it too.
Continuing the experiment.
 
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