Over the last few weeks we have fabricated and fitted our first 3 sets of steel bands to concrete tanks that we have installed liners in, to reinstate the structural integrity of the tank at full capacity. One in particular required 5 bands as the crack was so bad that the wall had completely separated, nearly enough to poke your finger in.
Horizontal cracks are fairly stable but vertical cracks can render the tank quite unstable, and this tank had a lot of vertical cracks. If you don’t ensure your concrete water tank is structurally sound as a worse case scenario you could find your tank wall somewhere down your paddock, after having been washed away with however many tonne of water you had stored in the tank. The tank liner provides the waterproof seal but it will not hold the weight of the water should the the tank wall give way.
If you are unsure about the structural integrity of your concrete water tank, fitting steel bands may be the simplest way to give you back your piece-of-mind, and can also potentially avert further movement and cracking of the tank wall in the future.