MCCB = moulded case circuit breaker. Used in bigger amperes rating such as 60A and above and mostly used in 3phase system.
What you are looking at is a MCB. Miniature circuit breaker. From 6amps to abt 100amps and normally single phase system.
2x150W = 300 x 1.8(losses) = 540W
Rated Current = 540W/230V = 2.3A
Use a 10A MCB
Can still connect a chiller of not more than 4.5amps rated current or 1.2kW without tripping.
Use the circuit with contactor if the total current for MCB 1 & 2 exceeds the current rating of the timer. There shall be a main MCB for the incoming, preferably with 30milli-Amp RCCB/ELCB in tandem.
You are still young and long way to go. The ocean is big enough to for you to venture and look for those who would treat you well. Dump her, get on your life and start fishing again.
No problem with SLF. They prefer those algae than fishes that moving around. I've got 4 in my small 2.5footer tank. Only thing is that they are a bit territorial with each other.
Just went to Jalan Kayu LFS. Still got lots of SLF.
Your dsb not matured yet. Be gentle on the feeding and continue do water change everyweek. My nitrate level is 0 after more than 8 months. Also, invest in good skimmer.