Costs of this project I can`t calculate precisely and don`t know what to include. The biggest item was front glass. It is around 15.000 EUR - but the glass price is moving. Concrete monolith around 3.000 EUR, waterproofing 1.000 EUR, background with sand 1.500 EUR, filtration system including pump 2.000 EUR. There is also heatpump - but it also heats the house and of course fish = around 20.000 EUR.