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Hi. Thanks for your reply. Yes, I cut back growth radically, but at some point growth slowed, but aquarium is not full of leaves at the moment and hasn't been for months. For surface agitation, I have the outlet of an external canister, about 2 inches below surface and an internal filter on...

Hi Caliban07 My aquarium is many years old so my filters are mature. I have external and internal filtration. But for some reason plants just stopped growing. Last year, growth was so fast, the tank was full of leaves. This is why it is so strange and I'm hoping to reset the conditions. I have a...

Update week 4. Green algae still a pain, mainly on leaves of alternanthera. Growth still poor. Did 40% water change mid week. Now deciding to add seachem traces every day, but will reduce iron to 0.05 ppm per day. One thing I have noticed, is that a leafless algae- covered twig that I was going...

Update after 3 weeks. Still not seeing the growth expected. After one week of 5.5 hr light period, green algae growth has reduced. I removed far less leaves during water change yesterday. Decided to do major cleaning of external and internal filters, pushed syphon tube about 1 cm into gravel...

Update, 2 weeks. Ppfd value 472. Slight drop from 492, on day 1. Green dust algae still a pain on alternathera leaves. Some new red leaves have been produced, but still waiting for signs of growth spurt. The last two weeks have had good co2, ferts, and light, but maybe it will take longer before...

Update. So, 1 week after new lights, issues continue with green spot algae growth on my alternanthera leaves. Growth in tank still less than hoped. But last night, I did notice some new tiny leaves growing out of a leaf internode on one of the alternanthera plants. That's the first time I've...

Go to play store, and look for ppfd. You'll know which one it is, as it has lots of good reviews and even some comments about good comparison with PAR meters!

Hi Delapool, The T5 are high output. ( sunwave 21 watt, 24 inch, 12000K).External and internal pumps. Co2 comes out of ceramic mister directly under input pipe of external cartridge filter, so very efficiently dissolved before coming out via outlet on other side of tank. Drop checker positioned...

Hi Delapool, It will be interesting to see how the plants respond now. Because I was convinced it was nutrients and/or co2, I've already pushed all of them into more of an EI approach for nutients and I have co2 at 3 bps into 50L tank, with drop checker pale lime green within hour of lights on...

So, today I placed new T5 lights above the aquarium. After turning them on and waiting 5 minutes, I used a free App that measures PPFD. I obtained a max of 560 approx 5 cm below centre of luminaire. I have no idea if 560 is an accurate value or can be related to PAR. However, most importantly, I...

Hi Caliban07, Thank you for your reply. Some extra information I forgot to include. I dose the phosphate only once at same time as 50% water change at weekends. Fe dtpa is added every day after light out. I have an external cartridge filter with co2 coming out of ceramic sinter underneath it, so...

Hi everyone. I'm hoping someone may have had similar experience and can help. I have been battling to get my plants to grow for months, but am running out of ideas. I'm now down to the last possible thing left- changing my T5 lights.I have a 50 litre aquarium. Here is a brief background to my...

Hi Leanne3, I had exactly this problem several years ago. I tried everything but failed, until installing an inline UV light hidden inside a cupboard below the aquarium. After 4 days the tank changed from green to white bloom! But when I added a flocculent, and returned 30 minutes later, the...