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post #1 of 5 (permalink) Old 02-25-2014, 02:36 AM Thread Starter
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holes in plants

Hi. I have horrible problem with my aquarium. It has been attacked by hair algae and some of my plants developed holes in leafs.Can you please help me finding the culprit. which nutrition is needed?
Plant is ludwigia and polysperma, it affect only older leafs.
Leafes go black/jellow and fell of within 2 days.


I change 30 liters (25% of water every week) RO water plus equilibrium seachem and bicarbonate soda. (gh7 kh5)
Equilibrium gives me lots of potassium (90ppm with 7gh which will be about 25ppm extra each week ) it also contain calcium, magnesium, manganese and iron.
I have to also dose a lot of kno3 and kh2po4 to keep my nitrate and phosphor above 0. (no3 10ppm po4 0.5ppm


I tried dosing a lot of seachem potassium, and magnessium. (for a month) Did not help.
More micro resulted in more algea.


please help








Tank: 120cm long x 36cm wide x 33 cm tall. (160 liters brutto) (120l netto)
Light 2x t5 39w. (Tropical pink and 12000k cool white) i had also 18w juvel but due to algae problem it is switched off. Light on from 10 am to 8 pm.
Filters: tetratec 1200 and tetratec 700.

PH: 6.8-6.9
GH 7
KH 5
Co2 bottle plus aqua medic 500 reactor.
Fish: rather a lot.4 bolivian rams, 12 cardinals tetra, 9 hatchets, 6 corys sterbai, 4 otocinclus and 2 vampire shrimps.
NO3 :5-10
PO4 0.5

Soil. jbl proflora plus sand and fine gravel on top of it.
Plants
microsium (algea problem but growing fast)
cryptoporyne vendtii ( algea problem but growing fast, new baby plants)
hygrophyla polysperma ( slow grow, pinholes)
ludwigia ( slow grow, pinholes)
nymphoides taiwan (very fast grow, new baby plants with every leaf)
Alternanthera reineckii 'Mini' (algae problem, one leaf was black)
Bacopa caroliniana (algae problem, slow grow)
Hemianthus micranthemoides (fast grow, algae problem)
glottosima ( very fast grow, algae problem)
ssylvania ( some leafes look like burnt, dried out)
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post #2 of 5 (permalink) Old 02-25-2014, 02:50 AM
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It really looks like potassium issues to me.

How are you testing the levels you state in your post? Test kit?


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post #3 of 5 (permalink) Old 02-25-2014, 12:39 PM Thread Starter
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Originally Posted by UDGags View Post
How are you testing the levels you state in your post? Test kit?
Hi.Thank you for your help.I dont use tests for potassium.I have jbl test for po4 (liquid). Test kit api (liquid), permanent co2 test and ph computer which is used only to show ph.
I thought it is potassium but it seems to be impossible.
My tank holds 145 litre of water...minus 30 litres (substrate, stones, bogwood) plus filters 10 l. It gives me approximately 125 litre of water ''netto''.

I change water every week. 30 litres (25%) Mixing Ro with equilibrium seachem gh.
Seachem consists of 23% potassium. Due to seachem support website rising my gh by 1 gh would increase potassium by 13.5 ppm.
My water prepared for change has gh 7 ( 30 litres with K at 95ppm,( 7*13,5ppm= 95 ppm)) After water change (which in this case is 25%) Potassium in my tank should rise to 23.75 ppm. 95ppm / 25%= 23.75ppm

So every week (for the last 6 months) i was dosing 23.75 ppm of potassium from equilibrium
After spotting holes I also bought seachem potassium and was dosing 10 ppm per week .It didnt help.
I dose kno3 which daily gives my 1.5ppm of N and 1ppm of K.... I also dose phosphor but there is little K in it.
All together I provide about 30 - 40 ppm of potassium weekly. Recommended level of potassium in aquarium is 10-20 ppm. I think I have enough.
Mayby I overdosed potassium and the problem is calcium?

Few weeks ago I changed 50% of water trying to reduced dissolved organic carbon and excess of build up fertilisers.
Didnt help.
I tried ready made JBL PROFLORA fertilisers but it only encouraged algae to grow. Now it is about 3 months since I saw first holes on leafs.Plants gradually melting, they have holes and weak stems.Now it is rather very fast process.
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post #4 of 5 (permalink) Old 02-25-2014, 04:33 PM
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Try upping NO3 to 20ppm and PO4 to 2ppm. Make sure K is 20-30ppm.

This could be some kind of micro, but as you stated using too much can cause algae issues.
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post #5 of 5 (permalink) Old 02-25-2014, 08:12 PM
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Potasiummmmmmmmmmm classic pinholes
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