The present invention relates to an integral component based modular tank system comprising multiple H-supports configured for connecting two end-caps, multiple lateral bars, liners and specifically designed linear seal for forming a modular tank of a desired length, with no limitation of length. The system is configured to connect consecutive single modular tanks to two end-caps configured to terminate the modular tank system at respective ends； multiple lateral bars configured to transmit horizontal mechanical force between the two end-caps through the H-supports, multiple liners configured to hold the intended content of the tank； and multiple linear seals consisting of an outer seal and an inner seal configured to hydraulically seal the liners and the end-caps to each other. The modular tank system further comprising optional provision of installing a 3-part interlocking bar system, horizontal supporting bars and sprinkler system for utilizing the tank as integrated green house system. The modular tank system is also utilized as aquaponics system by further incorporating floating or non-floating trays, piping assembly, pump and specifically designed reliable automatic siphon. Thermal insulation panels may also be fitted between the lateral bars of the modular tank system for minimizing heat exchange between the content of the modular tank system and the outside environment.
