Analisis Dinamika Kualitas Air pada Sistem Filtrasi Kimia (Hybrid Beads CaO2–Fe Alginate), Fisika, dan Biologi Pemeliharaan Lobster Air Tawar (Cherax quadricarinatus) Pemeliharaan Lobster Air Tawar (Cherax quadricarinatus)

Abstract

Intensifikasi budidaya lobster air tawar (Cherax quadricarinatus) berpotensi meningkatkan akumulasi limbah organik yang menurunkan kualitas air. Penelitian ini bertujuan menganalisis pengaruh perbedaan sistem filtrasi terhadap kualitas air, performa pertumbuhan, dan kelangsungan hidup C. quadricarinatus, serta menentukan sistem filter tertutup yang paling efektif. Penelitian menggunakan rancangan acak lengkap (RAL) dengan empat perlakuan dan tiga ulangan selama 42 hari. Perlakuan terdiri atas kontrol (tanpa filter), filter biologis (moving bed biofilm reactor), filter fisika (granular activated carbon dan zeolit), serta filter kimia (Hybrid Beads CaO2–Fe Alginate). Parameter yang diamati meliputi suhu, pH, oksigen terlarut (DO), total padatan terlarut (TDS), kekeruhan, konduktivitas, pertumbuhan, dan kelangsungan hidup. Hasil penelitian menunjukkan seluruh sistem filtrasi mampu mempertahankan kualitas air pada kisaran optimal. Namun, filter kimia menunjukkan efektivitas tertinggi dalam menjaga kadar DO dan menurunkan kekeruhan. Kondisi tersebut linier dengan capaian laju pertumbuhan harian dan kelangsungan hidup lobster tertinggi. Penggunaan media filtrasi berbasis Hybrid Beads CaO2–Fe Alginate berpotensi meningkatkan efisiensi pengelolaan kualitas air dan performa produksi budidaya intensif.

Intensification of freshwater crayfish (Cherax quadricarinatus) aquaculture potentially increases organic waste accumulation, which degrades water quality. This study aimed to analyze the effects of different filtration systems on water quality, growth performance, and survival rate of Cherax quadricarinatus, as well as to determine the most effective closed-loop filter system. The experiment was designed using a completely randomized design (CRD) with four treatments and three replications for 42 days. The treatments consisted of a control (no filter), biological filter (moving bed biofilm reactor), physical filter (granular activated carbon and zeolite), and chemical filter (Hybrid Beads CaO2–Fe Alginate). Parameters observed included temperature, pH, dissolved oxygen (DO), total dissolved solids (TDS), turbidity, electrical conductivity (EC), growth, and survival rate. The results showed that all filtration systems were able to maintain water quality within the optimal range. However, the chemical filter demonstrated the highest effectiveness in maintaining DO levels and reducing turbidity. This stable microenvironment was linear with the highest daily growth rate and survival rate of the crayfish. The utilization of a Hybrid Beads CaO2–Fe Alginate filtration medium has the potential to enhance water quality management efficiency and production performance in intensive aquaculture.