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Luca responded - thanks Luca and Tom for your thouhgts.
At 09.48 07/12/2001, you wrote:
>I have major infestation of BGA and whatever I do I can't shift it - I
>have not tried Erythromycin yet but have it on hand I want to get the tank
>The tank is 160litres (42gallUS) with 110W of fluorescent lighting
>(Dennerle) and Dennerle substrate and heating coils. Pressure Co2 setup
ok.. I've used Dennerle products myself for a long time! But you don't use
their liquid fertilizer, do you?
Difficult to get and expensive here. Shouldn't be a major problem though - nutrient and substrate compatiblity is
manufacturers marketing BS - I should know I have such a background :>)
>Temp 79, pH 6.6, KH 5, GH6 all measured with good (for the UK) kits
which means around 37ppm CO2 if there is anything else to acidify water.
Which is a LOT of CO2! How do you make KH and GH? RO water plus salts? or
Rain plus tap to target KH5
>I change 33% of the water weekly and at the same time add 8g K2SO4. This
>gives me a starting point of 30ppm of K which I think is in limits
WOW! go down at 10ppm K, not more. Lots of SO4-- too... go down!
Tom also suggested this - will do.
>I dose with 35ml of AP LeafZone weekly spread over the week and I dose 4 g
>of KN03 over the week to maintain a presence of 5-10 ppm NO3 on average
>(measured). Have used TMG but its difficult to get here but no difference
>to the problems.
I dont know AP LeafZone as product and its composition.Never tried Dennerle
Leaf Zone is effectively e15/v30 in a liquid mix
>And I have Algae! BGA the worst offender, there is also green powdery
>stuff on the glass and Green spot on the strictas. The reason I haven't
>tipped in the Erythro yet is that I am sure there is some kind of
>deficiency going on and I can't work it out. BGA I think would come back
>becuase the plants have never grown well.
BGA is IMHO always due to some N/P imbalance. Always! You said that you
have Dennerle substrate, which means Deponit mix, right? How much? Heating
coils are connected to Dennerle Duomat?
Recommended amount for a 160l tank - 2 buckets
Heating coils on all the time - Duomat v expensive and not necessary according to dealer
Above all, did you have the same algae problems in the first 2/3 months of
setup? - this is particularly important!!!
No but I did have the deficiency symptoms worse than I have now.
E Densa wouldn't grow - felll apart, Cabomba also
what is your fish load? and the filtration?
14 Cardinals, 12 Penguins, 4 corys, 2 ottos, 1 SAE
Check PO4 absolutely !!! it might be a PO4 deficiency !! :-)) if it's the
case, you could buy di-Potassium hydrogen phosphate anhydrous (K2HPO4), but
only with a very good PO4 test that could measure PO4 dissolved
orthophosphate down to 0.01ppm.
Could be - any thoughts on the Hagen kit or the Salifert
Check NO3 to be *sure* that they are at least 5ppm too.
I use a low range kit from Salifert - should be good, measures down to 0.2 ppm
hope this help!
It all helps Luca, any further thoughts welcome.
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