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  1. dw1305

    Agassizi ID

    Hi all, I really like them, I had some very similar ones, They bred true (all the males showed the same colours) so I assume they are a line-bred domestic form. I kept them for a while, but ended up with all male fry, and didn't continue with them, Mine were allegedly Czech bred. There is a...
  2. dw1305

    Hi from UK

    Hi all, Welcome Ben, are you adding CO2? I'm a little concerned by the colour of the gills in the fish in the photo below. Cheers Darrel
  3. dw1305

    RO water - is remineralizer required?

    Hi all, I don't really see any advantage to CO2, it only aids plant growth if none of the other mineral nutrients are limiting. The pH changes due to CO2 addition are a pretty strange and I don't think there is any advantage for pH control either. I'd look on all the trees in the flooded...
  4. dw1305

    Introducing microfauna: scuds, amphipods, isopods into botanical tank

    Hi all, If you mean small crustaceans, rather then real micro-fauna (Protists etc) then you want the Amphipod - "Northern River Shrimp" (<"Crangonyx pseudogracilis">) it is a N. American native and tolerant of warm water and acidity in a way that Hyalella or Gammarus aren't. cheers Darrel
  5. dw1305

    Uncommon, smaller, elongated (gar-like) surface-dwelling tankmates

    Hi all, Hemirhamphodon tengah ? <"https://aquainfo.org/article/hemirhamphodon-tengah-tengah-halfbeak/">. Not exactly what you are look for but <"Copella arnoldi">? cheers Darrel
  6. dw1305

    Fry Preventative Medication

    Hi all, I wouldn't use anything as prophylactic, I'd give them a good habitat, good water, a lot of moss and plenty of live food, it has always worked for me <"https://www.apistogramma.com/forum/threads/fry-tank-setup.12123/#post-66043"> &...
  7. dw1305

    Transitioning a stocked tank to have more acidic water without causing cycle crash

    Hi all, On UKAPS we've spoken recently to some of the scientists involved in looking at nitrification in aquarium filters and you might be interested in reading the whole thread...
  8. dw1305

    I think finally completed my tank (should I add some more dither?)

    Hi all, I'd get <"some floating plants">, Pistia stratiotes (Nile Cabbage) would be ideal and <"biotope appropriate">. They won't only fill a space and provide cover, they are <"very good for water quality">. cheers Darrel
  9. dw1305

    Reptile substrates for biotope beds?

    Hi all, Can you collect your own structural leaf litter? <"https://www.apistogramma.com/forum/threads/leaves-for-blackwater-aquarium.23177/#post-107937">. cheers Darrel
  10. dw1305

    Is this fry sick? Gill looks puffy

    Hi all, What @MacZ says. I'd actually go a bit further......... Don't add salt (NaCl) ever, it serves absolutely no purpose and is actively damaging to your plants and fish. cheers Darrel
  11. dw1305

    blackwater tank cycling?

    Hi all, I'd have to agree with Mike, it needs a lot more structure (like your other tanks). I'd just chuck them in, I think being large is actually probably an advantage. Personally I'd remove the L600, even as a small fish it will try and get in the cave and disturb the Cichlids at night...
  12. dw1305

    Yet another cycling question.. but a bit different

    Hi all, There are analytical techniques that work for nitrate (NO3-), but for most of us it really is "pick a number". It was actually the difficulties with getting <"accurate values for NO3"> that initially led to the development of the <"Duckweed Index">. I started working more with...
  13. dw1305

    Yet another cycling question.. but a bit different

    Hi all, I should have said that it Is the humic acid that is the likely compound. It interferes with both NO2 and NO3 testing when you are using hydrazine reduction and diazonium (to give you the red colour,). An ion selective electrode would get around this, but most testing nitrate testing...
  14. dw1305

    Yet another cycling question.. but a bit different

    Hi all, The water colour will have some effect, but I'm pretty sure that the compounds being measured aren't (all) NO2 and NO3. Cheers Darrel
  15. dw1305

    Yet another cycling question.. but a bit different

    Hi all, It is likely to be one of the reagents. @MacZ is right, that is the only value you need to tell you that you don't have that amount of nitrite (NO2-) and nitrate (NO3-). They are ions, they conduct electricity and your TDS is measuring the amount of ions in solution and "converting"...
  16. dw1305

    Best killilfish for a breeding apistogramma d18 pair

    Hi all, Normans Lampeye (Poropanchax normani) <"are OK at a pinch">. cheers Darrel
  17. dw1305

    tannins, apparent effect on floating plants

    Hi all, I'd just start adding a trickle more nutrients, if things don't improve you will know you have issues with <"Liebig's limiting nutrient">, you just don't which nutrient it is. Have a look at...
  18. dw1305

    Nanochromis splendens

    Hi all, We honestly aren't being rude, we have you, and your fishes, best interests at heart. I'm not a very good fish-keeper personally, but many members of this forum are. I'm not trying to be funny or confrontational, but this isn't like FB where everyone's opinion is "valid" and...
  19. dw1305

    blue-green algae issue

    Hi all, I don't have an answer, as well as tannic and humic substances I have Malaysian Trumpet Snails (Melanoides tuberculata) in the tanks and really heavy planting, but I'm not sure what stops the tanks getting cyanobacteria outbreaks. The only place I can sometimes find any obvious...
  20. dw1305

    blue-green algae issue

    Hi all, It is definitely Cyanobacteria. We think it might be associated with enhanced levels of dissolved organic matter, often arising from the filter (if you stuff your filter full and don't clean it etc). They are, and there are species that are associated with organic pollution and others...
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