Why I always see overseas keepers said their tank has flooding, mold or bug problem?
Overseas crabitat is let the crabs molting in main tank with deep substrate, no isolation, so keepers will not usually clean the substrate (only if they face flood or bug problem etc), some keepers may be even do not clean it for many years.
① Tank is sealed, the crabs always bring water out from pool or water dishes, water accumulate over a long period of time, so flood eventually caused.
② The crabs sometimes bring food out of food dish and bring it to their shelter, food detritus will mix with substrate (especially some food in flake or powder), but as keepers do not do deep clean for substrate, this will cause moldy or bug will visit.
In Asia, we isolate the crabs out of main tank for molting, no need to use deep substrate for main area. So, we can DO DEEP CLEAN clean substrate regularly without disturb the molting crabs, we can keep the substrate in better condition.
*Most important is I saw overseas keepers do deep clean when face emergency problem, they have to move all burrowed underground crabs to the surface and it definitely affect those molting crabs.