In your last pic you can see who will pop first. Notice the dark patch behind the belly the one on the right? The darker it is, the more developed the babies are. Its a great shot to show gestational stages in guppies. Great pic!
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The mesh is screening. Screen can be found at the hardware store. Cut it to the size of the intake hole like a patch and silicone the edges. Let dry overnight. Now you can keep small fish and shrimp.
As for your media idea, I'm sure it will work just the same. Most sump systems have the fluid...
The intake holes are too big. If you haven't filled it yet, silicone screen mesh on the inside of the intake holes. If you've filled it already, cut large pieces of the black filter sponge to shove between the glass and the intake holes.
As for fluidized media. You remove the old cartridge...
Here's how to mod the Fluval Flex output for a Nano Sterilizer. *NOTE can be applied to any submersible pump*
The Sterilizer I'm using is a 3W NanoZapp inline UV Sterilizer
Items needed:
Dremel Tool
4 zip ties
Scissors
Step one: Remove the old tubing from pump.
Step two: trim the nipple on...
My Modded Fluval Flex 15g
If you own a Fluval Flex, join the group. Fluval Flex Enthusiasts on Facebook.
Decorative:
Mopani Driftwood
Spider Wood
Dragon Stone
Anubias Nana
Cabomba
Amazon Sword
Hygrophilia
Echinodorus "Reni"
Ferts/Gas
Flourish Iron
Flourish Potassium
Flourish Phosphorus...