xZaiox
Member
Hi guys,
So I'm a bit confused about this one. My plants seem to have this yellowing/whitening and I can't figure out what's causing it. I use a pressurized CO2 system and I'm dosing standard EI levels of fertilisers. My light is a twinstar 900S, dimmed to 40% in order to limit algae growth.
I know CO2 is always the top priority when it comes to "deficiencies", but I do thiiiiink my levels are high enough. My drop checker is yellow, and the pH is relatively stable (about a 0.1 swing from start to end of photoperiod), I'm also experiencing a pH swing from 8.2 (degassed for 24 hrs) to 6.9, so this is a 1.3 pH drop, surely that's going to be injecting enough CO2? The CO2 comes on 4 hours before the lights, because for some reason my tank takes forever to equalise, if I were to make it drop over 2 hours then it would gas the fish by the end of the day... Anyway, the pH measurements were taken with a freshly calibrated pH pen, and I also simultaneously did API liquid pH tests, although I'm sure everybody knows they can be difficult to interpret...
I understand that flow is also important in a planted tank, and whilst I feel like there is room for improvement in my tank, the limnophila hippuridoides in these pictures is in the path of a good flow, it's leaves move and sway constantly, so if flow was the issue, then I would suspect that high flow areas would flourish whilst low flow areas would show the issues, right? My filter is a fluval 407, whereas the tank is 180L, so it's rated for roughly 8x the turnover.
These plants have been in here for nearing 2 months now. The water being used is tap water that is notably quite hard, with a dKH of 10 and a dGH of 20 (roughly). I thought this seemed to look most like either a magnesium or iron deficiency, but the magnesium is being dosed to 10ppm per week. I'm aware that certain iron chelators can have issues in harder water, and at first I was only using EDTA iron, so I decided to also add EI levels of DTPA iron, and ALSO dose Seachem's ferrous gluconate. I think this might have slightly helped because some of the growth used to look noticeably more 'white'... but here we are, still with the discolouration...
I need help gurus
So I'm a bit confused about this one. My plants seem to have this yellowing/whitening and I can't figure out what's causing it. I use a pressurized CO2 system and I'm dosing standard EI levels of fertilisers. My light is a twinstar 900S, dimmed to 40% in order to limit algae growth.
I know CO2 is always the top priority when it comes to "deficiencies", but I do thiiiiink my levels are high enough. My drop checker is yellow, and the pH is relatively stable (about a 0.1 swing from start to end of photoperiod), I'm also experiencing a pH swing from 8.2 (degassed for 24 hrs) to 6.9, so this is a 1.3 pH drop, surely that's going to be injecting enough CO2? The CO2 comes on 4 hours before the lights, because for some reason my tank takes forever to equalise, if I were to make it drop over 2 hours then it would gas the fish by the end of the day... Anyway, the pH measurements were taken with a freshly calibrated pH pen, and I also simultaneously did API liquid pH tests, although I'm sure everybody knows they can be difficult to interpret...
I understand that flow is also important in a planted tank, and whilst I feel like there is room for improvement in my tank, the limnophila hippuridoides in these pictures is in the path of a good flow, it's leaves move and sway constantly, so if flow was the issue, then I would suspect that high flow areas would flourish whilst low flow areas would show the issues, right? My filter is a fluval 407, whereas the tank is 180L, so it's rated for roughly 8x the turnover.
These plants have been in here for nearing 2 months now. The water being used is tap water that is notably quite hard, with a dKH of 10 and a dGH of 20 (roughly). I thought this seemed to look most like either a magnesium or iron deficiency, but the magnesium is being dosed to 10ppm per week. I'm aware that certain iron chelators can have issues in harder water, and at first I was only using EDTA iron, so I decided to also add EI levels of DTPA iron, and ALSO dose Seachem's ferrous gluconate. I think this might have slightly helped because some of the growth used to look noticeably more 'white'... but here we are, still with the discolouration...
I need help gurus