Hi and welcome to the forum! I’ll try and help with your questions if I can
- What temperature is your tank water currently? Some places in the world are warm so you don’t need a heater while here in the UK we need them as it gets quite cold in the winter time even indoors.
- The lid situation is fine, it doesn’t need to be air tight and to be honest I prefer it that way as there is good gas exchange. The only down side is you will need to stay on top of water top offs as evaporation happens more. Replace with pure RO or distilled water and don’t add more salt.
- some Shrimp are naturally pale or white and some are deep and rich red colour. It’s perfectly normal and may stay this way. If all of your Shrimp are pale and swim around in a frenzy constantly then I would test the water parameters as this is an indication water quality may be bad for them.
- I wouldn’t add snails to a tank that small but that is my own opinion obviously, they seem to bulldoze algae and this won’t leave much food for your Opae ula Shrimp in a tank of that size. You also want to keep waste down and snails can produce a good quantity in ratio to your water amount.
- Don’t worry about feeding the tank if you have any algae growing in the tank. If you don’t have any algae maybe try a small amount of spirulina powder once every 2 - 3 weeks. Get a little cocktail stick and dip it in and tap or poke it into the waters surface, you really only need a micro dot of food for that amount of Shrimp.
How old is your tank? If you give us all some more information it will help us get a better under standing of your situation.
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