Why not try nitrate reactor? Try this you will no more water change:
https://www.ebay.com/itm/Nitrate-Sulphur-Media-N40-Twin-Reactor-180-lt-Full-Kit/370103592451?hash=item562be4a603:g:Tj0AAOSw-dBTvpUy
I got this alert from other forum:
Some of you use the *** Tapatalk Branded App and Tapatalk App and we have tried to keep it working as long as possible. But I recently found out that the company who makes the app (Tapatalk) has started to store user information from forums and have begun to...