in May I will be going away for 9 weeks to conduct hawksbill turtle research in Tobago. Will my reef survive that long without a water change? My system is incredibly low tech (solely running on internal filters) and is ridiculously high in nutrient (nitrates typically sitting at 25-30 pmm). I have taught my flatmate how to feed the fish and corals and how to fill up the ATO, should I risk it and consider teaching them the water change process? I only keep lps and softies, would my high nutrient levels be too much for them to handle if they increased any further due to the absence of fortnightly water changes?