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Lava subtrate

  • PatrickG
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7 years 9 months ago #619 by PatrickG
Lava sub­trate was cre­ated by PatrickG
Hello,

what do you think about Lava gran­u­late on the ground of an planted Paro aquar­ium? I know Lava is dark, has a very large sur­face and is rich of micronu­tri­ents but it is sharp-​edged. So is it worth to try or not?

Greet­ings
Patrick

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  • Peter Finke
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7 years 9 months ago 7 years 9 months ago #620 by Peter Finke
Replied by Peter Finke on topic Lava sub­trate
Yes Patrick, it is worth to try it, I agree. I use lava gran­u­late in many of my small 12-​liter-​tanks. For the rea­sons you men­tion. But let me add some fur­ther points.
There are good breed­ers of Parosphromenus who dis­pense with a gravel entirely. Then you def­i­nitely need a small fil­ter as a “home” for the use­ful bac­te­ria. They set­tle on all sur­faces (glass roofs, plant leaves, wood etc.), it is true, but the gravel enlarges that set­tling space by far. There­fore I put nor­mally a very thin (a few mil­lime­ters) layer of grav­els on the ground and dis­pense of a fil­ter. Admit­tedly, a small bub­ble fil­ter make things safer.
The lava is sold in dif­fer­ent gran­u­la­tions. I pre­fer the smaller instead of the biggest. But in dif­fer­ent tanks I use other mate­ri­als, too. I don’t like the light forms, but I did not expe­ri­ence any bad effects on the fish if I used them. (The arti­fi­cially coloured mate­ri­als are dis­gust­ing, I think). Any­how, there are mostly beech or oak leaves placed on it, at least on parts of the bot­tom.
For peo­ple who con­cen­trate on breed­ing their fish a “nor­mally” planted tank is not the first choice. I have a few of them nev­er­the­less as eye catch­ers; one can raise young fish in them or use them for hous­ing small groups of licorice gouramis, but not for breed­ing pur­poses. In my small breed­ing tanks there are mosly plants, nev­er­the­less, but a reduced num­ber of species that don’t need a high layer of gravel or gravel at all; in some cases (Cryp­to­co­ryne) I plant them in very small pots. I think that friends of Parosphromenus should con­cen­trate on breed­ing, because these fish are rare and endan­gered. And the breed­ing is very inter­est­ing an adven­ture; it’s the most inter­est­ing part of the Paro-​aquaristics.
And for this lava gran­u­late is a very good base at the ground of the tank. There is another advan­tage of it: The very young fish that just have left the cave hide in the first time (two weeks or more) mostly on the ground. If there are leaves they could be found below. But the adult fish will find them there, too. The young are so mall, how­ever, that they can hide even deeper: in the small spaces of the lava gran­u­late. For this.lava is bet­ter than any other mate­r­ial, except peat fibres.
You are right, Patrick.
Last edit: 7 years 9 months ago by Peter Finke.

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7 years 9 months ago #623 by PatrickG
Replied by PatrickG on topic Lava sub­trate
I bought “Lavas­treu” (Win­ter­streu) from the com­pany “Hamann” at “Hornbach-​market”. The sub­strate is brown Lava and Basalt (Eifel?) 1:1. Gran­u­la­tion is 1-​5mm (max 10mm). It is not very sharp-​edged. The prize is very low (36Cent/​kg). The sub­strate does not effect pH or har­di­ness (tested in a glass of osmo­sis — water) and looks nice and natural.

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