You're not really poisoning your fish with your nutes? Don't get me wrong I don't care about fish, generally, but that is just a douche thing to do. Clean your reservoir yourself you lazy fuck.
http://www.lighthousehydro.com/grow-tents/grow-tent-4x4x7-lighthouse-grow-tent.html
Lighthouse hydro- 4x4x7 for $174. If you will be doing any scrog or other training intensive grow make sure you get something that opens on at least 3 sides.
Does anyone with a larger cooler scrog use an Active aqua to fill/drain your res? They can be submersible or used inline and I was thinking of using it inline for res changes.
In my opinion this isn't always good advice. Root rot varies a lot in terms of severity and starting over without trying any available remedies seems silly-no?