Aquaponics in a tote
Aquaponics builders like totes because the bottle is a sealed, cut-to-size volume of food-safe plastic, when the history says so. Fish live in the water, so the tote’s past matters more here than anywhere else on the ticket.
01What the tote does in a system
A 275 gallon tote can be a fish tank, a sump or, cut open and set on its cage, a grow bed. A 330 holds a fifth more. The bottle’s capacity, 1,040 litres for a 275 and 1,250 for a 330, is the starting point for the fish load and the plant bed it can feed.
The steel cage gives the structure. The bottle is the part that holds water, and its history decides whether it is safe for fish: a food-grade history, documented, is the safe start. A tote that held anything else, however clean, is a risk the builder carries.
02What to ask the desk for
| Part of the system | Tote use | What to say on the ticket |
|---|---|---|
| Fish tank | Whole bottle in its cage | Food-grade history, documented |
| Sump | Whole bottle | Food-grade history, a working valve |
| Grow bed | Bottle cut open | Food-grade history; state that you will cut it |
| Header tank | Whole bottle, raised | Food-grade history; mention the stand |
03What the desk will not say
The desk does not call a tote fish safe or food grade from its look or from a rinse. It says a tote has a food-safe history when the seller supplies the record. The buy page for food-grade history explains what the record has to show, and the drinking water guide explains why a used tote never counts as drinking water.
Cutting a bottle open ends its use as a tote. The retest date and the UN plate stop mattering once it is a tank.
04Practical points
- Keep light off the water: a translucent bottle grows algae.
- Plan the plumbing from the 2-inch valve: the valves and fittings guide shows the checks.
- Weigh the stand: water is 8.34 pounds a gallon, so a 275 is 2,294 pounds before fish and gravel.
- Check local rules for keeping fish and for outdoor water tanks.
?Questions on this page
Which tote for aquaponics?
One with a documented food-safe history. The desk asks the seller for the record.
How much does a full 275 weigh?
About 2,294 pounds of water, before the tote and anything in it.