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If I might make a suggestion; For about six pounds extra add a water level indicator which will allow you to monitor water levels and add water/nutients without disturbing the setup - and could save your grow if have a lot of evaporation in hot weather.
Actually many vapers (including myself) regularly use water in their mixes with no adverse effect, though more commonly Propylene Glycol is used to thin it out - I only said water to keep costs down even though PG is pretty cheap in its own right.
Hi,Good idea but as a vaper might I make a suggerstion? Buy some vegetable glycerin - a liter would be only a few dollars, add some food flavouring of your choice (peppermint, vanilla, lemon - whatever you have) thin it with ten to twenty percent water and hey presto! you have some very cheap vape juice that will last for quite a while. I have some other ideas to make this cheaper as well... let me know if you're interested...Pamberdog.
Like this, nice idea.. Just a thought, If you were to cut simple slots in the hinge side of the box lid you trail the cables through those and when not in use they would be invisible to the casual observer and it would look like an ordinary attractive presentation box??!!