Water does not represent your debt. Your money spending come from your TaYun.
There are a couple of years that you need to be extra careful with your health and money.
For strong 旺 or Cong 从 self, wealth stars 财才 represent your wealth but rob wealth 劫比 by themselves alone are not your poor stars.
It is bad only when rob wealth 劫比 clash and suppress your wealth star 财才 then it is when you are poorer and only then you can consider them as your money speeding/losing or as you put it, your debt stars.
In BaZi, never interpret directly what the stars represent for example see 财才 (water) as rich and see 劫比 (earth) as poor, 伤食 is clever and 印卩 is stupid. Even without 伤食 or without 印卩, he or she will not be stupid. When one with both 财 and 劫 he is poor and he is rich! when one with 伤 and also with 印 he is clever at the same time he is also stupid!! This doesn't sound right.
For example in one particular year when you see with strong 劫比 sitting on 劫比, you cannot immediately and directly say that you are going to lose a lot of money and have a lot of debt or health issues. It only bad when 劫比 (earth) are able to injure or kill your 财才 (water). It can be small spending, big spending, and spending not necessary a bad thing. It can be used to generate more money.
All these can be seen from 生克. 生sheng - produce, 克 ke - suppress
生克断吉凶,不是喜忌断吉凶
Cheers.
