Just received a new Fluval Flex 9 gallon which I'll be using for my Neocardina Davidi var. orange shrimpettes. They are currently in a 1-1/2 gallon vase jarrarium with Aquasolum by Aquavitro substrate, live plants, no heater or filtration. I have leftover Aquasolum substrate which I'm thinking of using again, either as a base substrate with sand or gravel cap or just by itself like I did in the jarrarium. The reason I'm considering a cap is it's difficult to plant in and the cap could help with that. I see Black Diamond sandblasting sand is popular but not eager about buying a 50lb bag and having to store the leftovers. Or, just capping with regular old black gravel from the pet store. I'm leaning towards using it by itself cause I'm not sure how a cap would look on the round Aquasolum pellets plus it is what the shrimp are used to, they were born in the vase. Any suggestions from you pros much appreciated, this is my 1st foray into raising shrimp.
Here are some pics of their existing setup: Shrimp Jarrarium Album