heavy metal axe filter vs ro system

[FrostiesFishes]

as the titles states I'm looking for peoples advise on a HMA filter vs a Ro system. i stumbled across hma filters when reading an article from England about using those filters for breeding soft water fish . but from my understanding is it doesn't have any waste water or lower the tds. so im looking for people who have experience with them.  and is tds a good standard to be measuring water quality for breeding lets say tetras and apistos.

[Fish Folk]

On 10/24/2021 at 5:43 PM, FrostiesFishes said:

as the titles states I'm looking for peoples advise on a HMA filter vs a Ro system. i stumbled across hma filters when reading an article from England about using those filters for breeding soft water fish . but from my understanding is it doesn't have any waste water or lower the tds. so im looking for people who have experience with them.  and is tds a good standard to be measuring water quality for breeding lets say tetras and apistos.

I think you might want to ask this in light of what you’re wanting to breed. Apistos, for example, may have a number of triggers before you labor to soften water substantially. Ours bred in low 3-drop KH range, straight from our tap. Other finicky Cichlids like our Purple Smilers spawned when we changed out about 1/5 of the tank with Rain Water. Discus may require an R.O. System for breeding. But Tetras might just need lots of tannins from leaf / wood / pod black water breakdown. I’m not familiar with the HMA filter, but if you get a reliable spawning report from a breeder who uses it, then I’d assume it can work.

[FrostiesFishes]

Yeah, I was trying to avoid the ro waste water. I’m looking to spawn tetras in general. I fell like you hardly ever here about them being spawned. Specifically I’ve got a group of Phenacogrammus aurantiacus "Lamp Eye Congo tetras. That I’m trying to spawn