in 5 gallon buckets the last two weeks are you suppose to flush everyday? and how much for the 5 gallon pots?
No you don't. You don't even have to flush if you don't want. Id do it just once maybe twice if you must.
There's no such thing as to much water if you have good drainage it will be the same amount left in the soil you'll have a ton of run off that's the point
Just start watering with plain phed water when the pot dries for the last 2 weeks is what you should do... Some poeple flush with 3 times the amount to clean the soil when a problem accurs but if your plant is healthy up to the last 2 weeks you should have no need to do this type of flush... I assume you follw the water,water,feed schedule? if so then the 2 times you water between feeding is like a mini flush evertime you do it.