Biotope is a strategy game developed by MBL Development and published by 2tainment GmbH in 2019. Biotope will be the most detailed and realistic aquarium simulator on the market. Biotope makes it possible to create complex aquarist ecosystems and simulate realistic life cycles of plants and fish.
The system requirements are lightweight; almost any new computers will work for playing Biotope.
The RAM requirement of 4gb is easily met, though 2gb is enough to meet the minimum requirements.
Also, note that at least 1gb of hard drive space is required.