Plants yellowing in my Fluval edge - The Planted Tank Forum
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post #1 of 3 (permalink) Old 10-25-2016, 01:42 AM Thread Starter
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Plants yellowing in my Fluval edge

Hi everyone. Have been following this site for a while - really great site. Finally, in August decided to set up My first ever tank for a rescued betta. Long story short, the betta is getting its own tank and decided to convert this into a nano community tank with nano fish. It has a small school of ember tetras and a honey dwarf gourami as well as couple of Amani shrimp and an assassin snail. I also have some mops I, with natural gravel as a substrate

I cycled the tank fishless for a month with only the plants. The plants comprise crypto beckettii, s. reopens, Anubis nana petite, trident java fern and bacopa Carolina. I also tied java moss to the mopani but that completely disintegrated.

I put a flourish root tab near the crypto from the beginning. Started dosing with flourish comprehensive about a month ago. I use the recommended dose once to twice a week. I have the standard filter that comes with the Edge which includes sponge, biobeads and activated carbon, all in a hob 20 filter. About two weeks ago I replaced the carbon with purigen: the tannins were incredibly dark and I learnt that carbon removes micro nutrients. Purigen did wonders for the tannin - the water is crystal clear. I perform weekly 30% water changes with gravel vacuum. My readings are 0 for Ammonium, Nitrite and Nitrate (API liquid test). Hardness is at 50-150 for both Gh and Kh according to the API drop count test. The lights are on a timer and are on 9 hours a day.

All of the plants were doing great given especially the low light tank that the Edge is. Bacopa gained 2 inches in a month. S. reepens grew an inch and spread laterally. The trident java was pretty much stable - no grawth, and the crypto added a ton of new leaves. I have not noticed any algae. Also the critters and the fish are all super happy.

Two weeks ago some leaves on the trident java started turning yellow. I thought it was shedding some old leaves. Now S. repens leaves are turning yellow too. They yellow is starting at the tips of the leaves and spreading. Crypto still looks great. Bacopa is still growing as fast as ever.

I figure I need to somehow add more nutrients to the water, but after researching, I am a bit confused as to what. I have the micros covered through flourish comprehensive - I think that takes care of iron, magnesium, zinc etc. (Please correct me if I am wrong). Given the low light, I do not believe I need carbon (excel or co2).

So should I be getting the macro supplements ( nitrogen, phosphate and potassium supplements ) from flourish and start adding those as well. I thought the fish would supply those? Should I add more fish? Given that this is a nano tank I am weary of that.

Thanks in advance for all your advice. PS: I lov this hobby - it is art, science and crafts combined into one. My wife is worried about me given the amount of time I spend on it
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post #2 of 3 (permalink) Old 10-25-2016, 02:13 AM
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Start dosing potassium and iron,yellowing of leaves is a sign of potassium deficiency. You also can use seachem root tabs.Cheers

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post #3 of 3 (permalink) Old 10-25-2016, 03:27 AM Thread Starter
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Thanks. I'll get potassium. As for iron, since I am already using flourish comprehensive, would I not be overdosing if I add additional iron?

I already have a tab by the crypt. Would it a tab be beneficial to S. Repens as well?
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