I-Las izitshalo zasemanzini zingaphezu nje kokuhlobisa. Bangabantu abaphilayo futhi ngenxa yalokho badinga ukunakekelwa okuthile nezimo ezithile zokulondolozwa kwentuthuko yabo. Ngaphakathi kwawo i-substrate idlala indima ebalulekile ekwakhiweni okufanele kokulingana okufanayo nokuhle kwezinto eziphilayo kwi-aquarium ecosystem.
Izitshalo zemvelo zidinga ama-micro nama-macronutrients ukuthuthukisa kahle. Ezingxenyeni ezingaphansi komhlaba kuxazululwa amakoloni amabhaktheriya abhekele ukuguqulwa kwe-nitrite ibe yi-nitrate kuthi eyokugcina ibe yigesi ye-nitrogen engenabungozi.
I-Los substrates zihlukaniswa ngosayizi, umbala, ukuthungwa nokwakheka kwamakhemikhali. Ukusuka lapho sithola udaka, ubumba nesihlabathi esihle futhi lezo ezijiyile ezisuka esihlabathini ziye emadwaleni. Ama-granules abalulekile ngoba akhuthaza ukusakazwa kwamanzi futhi aqinisekisa isisekelo esingaphansi se-methane ne-hydrogen sulfide esivela kumatravel ahlanganisiwe.
Usayizi ofanele futhi olungile yilowo ovumela ukuhamba kancane kodwa okuqhubekayo kwamanzi kokuthuthuka okulungile kwe- izimpande zezitshalo. Okufaneleke kakhulu yilezo ezihlukaniswa njengezihlabathi ezihhadlile, ezisuka ku-millimeter eyodwa zijiyile, kuqukethe amatshe phakathi kuka-3 no-5 mm. Kumele kucatshangwe ukuthi ama-substrates ane-calcareous acebile nge-calcium azophikiswa kuma-aquariums anezidingo zamanzi athambile futhi ane-asidi. Esikhundleni salokho zinenzuzo yamathangi wamanzi anzima futhi ane-alikhali.
Ngokuphathelene nevolumu, yize kungekho mithetho ehleliwe, kulula ukuthi lokhu ungabi ujule kakhulu, phakathi kuka-8 no-10 cm ngaphambili kwethangi no-15 noma 20 ngemuva. Uma sikhetha ukubeka ikhebula lokushisa ngemuva, kujwayelekile ukulibeka ngqo engilazini eyisisekelo. Ngokuqondene nombala, ngokusho kobuhle obulandelwa yi-aquarium nezinhlanzi. Futhi ungalokothi ukuthi ama-substrates anezindlela ezinolaka noma ezicijile ezifana nedwala lentaba-mlilo.