closed-system rewatering and plant wastes?

[plantzzzzz]

Originally Posted by Ray

Plants wastes and mineral residues are the least of the problem. As was mentioned, pathogens are the real danger.

Closed-loop systems are fine for plants with short maturation cycles that get harvested, but a long-term plant like an orchid is a whole different critter.

Are there ways to disinfect water in a closed-loop system?

Could you bubble ozone through it, or would that harm the plants?

[dethswatch]

Originally Posted by plantzzzzz

Could you bubble ozone through it, or would that harm the plants?

Aren’t the aquarium guys using UV lights to kill pathogens?

[Swimmingorchids]

If I have encountered a problem in the past I would use hydrogen peroxide at a very low dose but I am thinking of going lower still with orchids.

I am going to try 40ml of 3% HP per liter of water in future...

I think that works out to roughly 0.1% hydrogen peroxide. Wouldn't use it permanently.

[camille1585]

Originally Posted by dethswatch

Aren’t the aquarium guys using UV lights to kill pathogens?

Many, many horticultural businesses use UV to kill pathogens in water. All those growers who use ebb and flow to water their plants will drain it back into tanks to recycle, otherwise it costs way too much in terms of both water and fertilizers. They will usually use more than 1 type of method, and UV is often one of them.

[Swimmingorchids]

Uv doesn't kill pithium (root rot) or bacteria. From my understanding it can kill living harmful microorganisms for fish and removes algae in aquariums. Def more useful for aquariums