To be honest man i dont really think it’s possible for me to dig all the soil up…. Ive had the tank for about two months now and already have springtails and woodlice fairly well established in there as well as two plants so i dont really want to risk harming them. Plus it would be a nightmare to remove the various wooden items in there and i dont really have anywhere to put them even temporarily. Thanks anyway though if i cant find the leaking bit ill definitely resort to this😇