Buying gear
Use this path when you need filters, heaters, lights, substrate, air pumps, or starter supplies that fit the tank.
Freshwater aquarium tools for safer tank choices
Freshwater Aquarium Tools
Use these freshwater aquarium tools when you need a practical answer before buying gear, mixing water, or making a change in the tank.
These tools are decision helpers, not magic answers. They should reduce guessing, not replace water testing or observation.
Pick The Tool Category That Matches The Job
Water changes
Use this path when source water, mixed water, or TDS changes could stress fish or shrimp.
Shrimp stability
Use this path when small swings in TDS, GH, KH, pH, or temperature can turn into molting trouble.
Fish health
Use this path for triage, water checks, quarantine planning, and knowing when a tool is not enough.
Setup planning
Use this path before a new tank, upgrade, hospital tank, planted setup, or budget build.
Live Freshwater Aquarium Tools
Each card shows a simplified example of the decision the tool helps with. Open the tool to enter your own tank details.
Simple decision path
Questiongear, water, health, or setup
Inputtank facts first
Next steptool, guide, or get help
Aquarium Equipment Finder
Mini interface preview
Tank20 gal
Needfilter fit
Resultshort list
Best for: narrowing filters, heaters, lights, substrate, testing supplies, conditioners, air pumps, and setup gear by tank size, livestock, and care style.
Use when…
- You know the tank size and the livestock plan.
- You want a fit-first gear list before reading full reviews.
- You are setting up or replacing core equipment.
Do not use when…
- You need a current retailer price check.
- You have a disease emergency or unexplained losses.
- You have not decided the tank size or livestock yet.
TDS Calculator
Mini interface preview
Source A110 ppm
Source B240 ppm
Estimatemixed TDS
Best for: estimating a mixed-water TDS result before a water change, remineralizing decision, or source-water blend.
Use when…
- You are blending RO, tap, remineralized, or stored water.
- You keep shrimp and want steadier water-change planning.
- You will still confirm the tank with real tests.
Do not use when…
- You need ammonia, nitrite, nitrate, GH, KH, pH, or temperature answers.
- Fish or shrimp look stressed right now.
- You are chasing one number while the tank is unstable.
Before You Act On A Tool Result
- Test ammonia, nitrite, nitrate, pH, temperature, GH, KH, and TDS when the decision depends on water quality or livestock health.
- Confirm the tank size, livestock, bioload, current gear, and normal maintenance routine.
- Look for recent changes: new fish, new food, filter cleaning, medication, missed water change, outage, or temperature swing.
- For illness concerns, check water first and avoid treating symptoms blindly. Medication can add stress when the root problem is water or compatibility.
- For shrimp, make smaller and steadier changes. Chasing one number can create the swing you were trying to avoid.
Planned Tool Roadmap
These cards show what is planned next. They are not available yet; live tools are listed above.
Shrimp Stocking & Compatibility Calculator
Tank size, shrimp-type water targets, and tankmate checks in one place.
Fish Symptom Triage Tool
Fish health path for symptoms, water checks, quarantine notes, and when to ask for experienced help.
Water Change Impact Calculator
Estimate how a water change may shift TDS or related water-change planning numbers before touching the tank.
Shrimp Remineralizer Calculator
Careful shrimp-water helper that needs species, product, GH, KH, and TDS guardrails before it should go live.
Budget Aquarium Setup Planner
Setup planning path that separates must-have gear from nice-to-have extras so money goes toward the right problem.
Product Guidance And Trust
- Good fit comes before affiliate availability.
- Beginner-safe explanations come before shortcuts.
- Planned tools stay clearly marked until they are real and tested.
- Product links should support the decision, not replace the explanation.
Some product links may earn Pete’s Aquatics a commission at no extra cost to you. Tool results stay compatibility-first: tank size, livestock, maintenance, safety, and long-term fit come before affiliate availability.
The Review Methodology explains how Pete’s Aquatics handles product guidance, and the Affiliate Disclosure explains commission links.