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  1. dw1305

    Signs of low oxygen levels at night?

    Hi all, Definitely add it. Plants take up ammonia, and nitrite as well as nitrate and that is a massive gain in oxygen terms, because microbial nitrification is an oxygen intensive process. They can, but only in certain circumstances. You can mitigate for it by having some flow (increasing the...
  2. dw1305

    Signs of low oxygen levels at night?

    Hi all, Yes, nice tank. I think you should be fine, Pistia doesn't tend to form a complete cover on the water surface, the way a "flat" plant like Duckweed (Lemna minor) would. cheers Darrel
  3. dw1305

    Pencil fish ID

    Hi all, I think it is just they are more likely to eat Apistogramma fry than other Pencilfish. I'd agree they are a very attractive fish and easier to care for, and breed, than the other species. My go with these <"ended in tears">, but they are also a very underrated and attractive fish, if I...
  4. dw1305

    Viejita and Cacatuoides

    Hi all, I wondered about that, but A. allpahuayo, as well as the black chin ( ‘Schwarzkinn'), should have a detached black caudal peduncle blotch and red/orange lips. I get more of these wrong than right, so you may well be right. cheers Darrel
  5. dw1305

    Leaves for Apistos

    Hi all, I'd go for much less than that, I'd just see how quickly it dissolves, but I'd be literally using tea-spoon amounts for starters. Yes, it should reduce pH movement. Add a lot more Oak leaves. Have a look at <"All the leaves are brown">. <"Citric acid"> might be another option, have a...
  6. dw1305

    Leaves for Apistos

    Hi all, You now have soft, alkaline water, the NaOH disassociates fully into Na+ and OH- ions, so there is no reserve of buffering.You could add a little bit of <"oyster shell"> etc. to give you some carbonate buffering. The sodium hydroxide addition is to control heavy metal levels, resulting...
  7. dw1305

    Viejita and Cacatuoides

    Hi all, I don't know what he is, but he is a smart fish. My guess is that is the right ID. cheers Darrel
  8. dw1305

    Cacatuoides with L260

    Hi all, A bit of both, the Hypancistrus L129 fry claimed all the "tight" caves and also ate any eggs that the cichlids laid, in the more open pots etc. At various other times I stored a male Ancistrus L100 and female Hypancistrus L333 (separately) in the tank, and they really went for the...
  9. dw1305

    Cacatuoides with L260

    H all, Nice tank, you could try adding some <"structural leaf litter"> and <"moss">. I've kept Apistogramma cacatuoides with another <"smaller Hypancistrus species"> (H. debilittera L129) and with <"Cherry shrimp">, and neither went very well as a combination. cheer Darrel
  10. dw1305

    Which peat or sphagnum moss to use to low pH?

    Hi all, It is slightly acidic, because of the small amount of dissolved CO2. If you add your tap water the pH will go to pH 7.8 ish, because of the CO2 ~ carbonate ~ pH equilibrium. If you use RO you just need to add a very small amount of tap water and some botanicals to lower the pH. cheers...
  11. dw1305

    apisto cacatuoudes tank

    Hi all, Not recently, I don't have enough tanks to really require it, and I'm quite happy to have relatively few fry survive. This isn't an area where soft water fish are very popular and re-homing, even a limited number of young fish, can be problematic. I keep very weedy tanks and I find that...
  12. dw1305

    Nijesseni spawn vs cockatoo - question on egg hatching

    Hi all, The quoted conductivity values are nearly always microS/cm, so if just see 80 microS, it means 80 microS/cm. Perfect, as @Ben Rhau says it should be a linear scale, I'd start with 10:1 RO:tap, you can always add more tap, but you can't take it away. If you can set your TDS meter to...
  13. dw1305

    Nijesseni spawn vs cockatoo - question on egg hatching

    Hi all, Electrical conductivity is measured in microSiemen/cm, it is a measure of all the ions in solution. It is a linear scale, from DI water at less than 5 uS/cm to full sea water at 53,000 microS. Our tap water is from a limestone aquifer, and about 650 microS, and our rain-water about 100...
  14. dw1305

    apisto cacatuoudes tank

    Hi all, Not as far as I know. @Mike Wise says it is best to feed worms, of any description, fairly sparingly because of their high fat and protein content, but they are fantastic foods for <"conditioning fish for spawning">. I've mainly been feeding California Blackworm (Lumbriculus...
  15. dw1305

    Nijesseni spawn vs cockatoo - question on egg hatching

    Hi all, Yes it is like @Ben Rhau says you can't really have pH stability in very soft water, because pH is both a Log^10 scale and a ratio you can't extrapolate from hard water (where pH is stable) to soft water (where it isn't). Have a look through <"Water parameters....">. I think A. panduro...
  16. dw1305

    Nijesseni spawn vs cockatoo - question on egg hatching

    Hi all, Can you mix in some RO or rainwater? It would help soften the water to the state where humic acids from <"Oak leaves or Alder cones"> could depress the pH and hardness. Have a look at @tjudy's posts in <"How to mimic..."> and <"keeping low pH">. cheers Darrel
  17. dw1305

    Nijesseni spawn vs cockatoo - question on egg hatching

    Hi all, I think you've answered your own question. Apistogramma cacatuoides will spawn successfully at higher pH and hardness levels than every (nearly every?) other Apistogramma spp. cheers Darrel
  18. dw1305

    Wasting disease ?

    Hi all, Unfortunately still the bane of all forums. You can report it via the "Report" link at the bottom left of the message. cheers Darrel
  19. dw1305

    Pleas help me ID

    Hi all, She is most likely to be A. agassizii, just based on probability. Like the others have said you can't exclude the other possibilities, but they are all much more unusual fish. cheers Darrel
  20. dw1305

    Discrossus Finally some babies

    Hi all, Brilliant, I like your Utricularia gibba, and I'm a great moss fan. cheers Darrel
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