Royal Dwarf - outdoor

Went on holidays for a week. Had to put the smaller plant inside because of heavy rainfall forecasts. That one still looks pretty good, despite the snail attack and duct taped stem earlier in the grow. I started giving blooming nutrient (Alga Bloom from Plagron) just before I left (so that's week 9). Other than that, the whole grow only has been 'fed' with tap/rain water. The weather has been shit for the past 10 days or so. The big one is showing some strange patterns on the leafs which concern me... As a friend of mine gave them water (+ some blooming nutrient) once last week, he told me 3 leafs were a bit brighter. Just 4 days later, it looks much worse so I thought I had to act quick. I guess there is a lack of kalium and phosphorus, so I gave the plant water + a little bit of Alga Bloom + a little bit of Green Sensation. I hope this will turn out well... Hoped to be able to harvest them at week 12, but I'm not so sure... Weather is shit and will be shit for at least 7-10 more days. Tell me your thoughts! :-)